diff --git a/package-lock.json b/package-lock.json
index b2f866d83..9532b7129 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -3825,9 +3825,9 @@
 			}
 		},
 		"node_modules/@webref/css": {
-			"version": "8.7.4",
-			"resolved": "https://registry.npmjs.org/@webref/css/-/css-8.7.4.tgz",
-			"integrity": "sha512-Wo1iEFRPnMehms5A9xUpZxUkUMkNEGXEVX97yB3up2CsqyK/UtKgVcxUOplMVeL1SLVry0c1JPepMIXNAOWXPA==",
+			"version": "8.7.5",
+			"resolved": "https://registry.npmjs.org/@webref/css/-/css-8.7.5.tgz",
+			"integrity": "sha512-VQygoDH6OptDhYib3Uxo2e1uftOv2Tx9yddzUyAXOmsLquyrV46w5VzXla2kPAIK70+Lo56NzzrltKMqiBrrLg==",
 			"dev": true,
 			"license": "MIT",
 			"peerDependencies": {
@@ -8274,7 +8274,7 @@
 			],
 			"license": "MIT-0",
 			"devDependencies": {
-				"@webref/css": "^8.7.4",
+				"@webref/css": "^8.7.5",
 				"css-tree": "^3.2.1",
 				"postcss": "^8.5"
 			},
@@ -8595,7 +8595,7 @@
 				"@csstools/pack-test": "*",
 				"@csstools/postcss-bundler": "*",
 				"@csstools/postcss-tape": "*",
-				"@webref/css": "^8.7.1"
+				"@webref/css": "^8.7.5"
 			},
 			"engines": {
 				"node": ">=20.19.0"
@@ -10519,7 +10519,7 @@
 			},
 			"devDependencies": {
 				"@csstools/postcss-tape": "*",
-				"@webref/css": "^8.7.1"
+				"@webref/css": "^8.7.5"
 			},
 			"engines": {
 				"node": ">=20.19.0"
diff --git a/packages/css-syntax-patches-for-csstree/CHANGELOG.md b/packages/css-syntax-patches-for-csstree/CHANGELOG.md
index 43acfe084..d1a9cd5a7 100644
--- a/packages/css-syntax-patches-for-csstree/CHANGELOG.md
+++ b/packages/css-syntax-patches-for-csstree/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changes to CSS Syntax Patches For CSSTree
 
+### Unreleased (patch)
+
+- Update `@webref/css` to [`v8.7.5`](https://github.com/w3c/webref/releases/tag/%40webref%2Fcss%408.7.5)
+
 ### 1.1.14
 
 _September 15, 2026_
diff --git a/packages/css-syntax-patches-for-csstree/dist/index.json b/packages/css-syntax-patches-for-csstree/dist/index.json
index a1d0650ea..15fda9f26 100644
--- a/packages/css-syntax-patches-for-csstree/dist/index.json
+++ b/packages/css-syntax-patches-for-csstree/dist/index.json
@@ -121,7 +121,7 @@
 			"background-tbd": "<bg-layer>#",
 			"baseline-shift": "<length-percentage> | sub | super | top | center | bottom",
 			"block-ellipsis": "no-ellipsis | auto | <string>",
-			"block-size": "auto | <box-size>",
+			"block-size": "auto | <box-size> | <anchor-size()>",
 			"block-step": "<'block-step-size'> || <'block-step-insert'> || <'block-step-align'> || <'block-step-round'>",
 			"block-step-align": "auto | center | start | end",
 			"block-step-insert": "margin-box | padding-box | content-box",
@@ -215,7 +215,7 @@
 			"column-rule-visibility-items": "all | around | between | normal",
 			"column-rule-width": "<line-width-list> | <auto-line-width-list>",
 			"column-span": "| <integer [1,∞]> | auto",
-			"column-width": "auto | <length [0,∞]> | <box-size>",
+			"column-width": "auto | <box-size>",
 			"contain": "none | strict | content | [ [ size | inline-size ] || layout || style || paint ]",
 			"contain-intrinsic-block-size": "auto? [ none | <length [0,∞]> ]",
 			"contain-intrinsic-height": "auto? [ none | <length [0,∞]> ]",
@@ -296,7 +296,7 @@
 			"grid-column-gap": "normal | <length-percentage [0,∞]> | <line-width>",
 			"grid-gap": "<'row-gap'> <'column-gap'>?",
 			"grid-row-gap": "normal | <length-percentage [0,∞]> | <line-width>",
-			"height": "auto | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> ) | <-non-standard-size>",
+			"height": "auto | <box-size> | <anchor-size()> | <-non-standard-size>",
 			"hyphenate-limit-chars": "[ auto | <integer [0,∞]> ]{1,3}",
 			"hyphenate-limit-last": "none | always | column | page | spread",
 			"hyphenate-limit-lines": "no-limit | <integer [0,∞]>",
@@ -307,7 +307,7 @@
 			"initial-letter": "normal | <number [1,∞]> <integer [1,∞]> | <number [1,∞]> && [ drop | raise ]?",
 			"initial-letter-align": "[ border-box? [ alphabetic | ideographic | hanging | leading ]? ]!",
 			"initial-letter-wrap": "none | first | all | grid | <length-percentage>",
-			"inline-size": "auto | <box-size>",
+			"inline-size": "auto | <box-size> | <anchor-size()>",
 			"inline-sizing": "normal | stretch",
 			"input-security": "auto | none",
 			"isolation": "<isolation-mode>",
@@ -333,18 +333,18 @@
 			"mask-border-slice": "<'border-image-slice'>",
 			"mask-border-source": "<'border-image-source'>",
 			"mask-border-width": "<'border-image-width'>",
-			"max-block-size": "none | <box-size>",
-			"max-height": "none | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> ) | <-non-standard-size>",
-			"max-inline-size": "none | <box-size>",
+			"max-block-size": "none | <box-size> | <anchor-size()>",
+			"max-height": "none | <box-size> | <anchor-size()> | <-non-standard-size>",
+			"max-inline-size": "none | <box-size> | <anchor-size()>",
 			"max-lines": "none | <integer [1,∞]>",
 			"max-size": "<'max-width'> <'max-height'>?",
-			"max-width": "none | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> ) | <-non-standard-size>",
-			"min-block-size": "auto | <box-size>",
-			"min-height": "auto | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> ) | <-non-standard-size>",
-			"min-inline-size": "auto | <box-size>",
+			"max-width": "none | <box-size> | <anchor-size()> | <-non-standard-size>",
+			"min-block-size": "auto | <box-size> | <anchor-size()>",
+			"min-height": "auto | <box-size> | <anchor-size()> | <-non-standard-size>",
+			"min-inline-size": "auto | <box-size> | <anchor-size()>",
 			"min-intrinsic-sizing": "legacy | zero-if-scroll || zero-if-extrinsic",
 			"min-size": "<'min-width'> <'min-height'>?",
-			"min-width": "auto | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> ) | <-non-standard-size>",
+			"min-width": "auto | <box-size> | <anchor-size()> | <-non-standard-size>",
 			"mix-blend-mode": "<blend-mode> | plus-lighter",
 			"object-fit": "fill | none | [ contain | cover ] || scale-down",
 			"orphans": "<integer [1,∞]>",
@@ -492,6 +492,7 @@
 			"timeline-trigger-active-range": "[ <'timeline-trigger-active-range-start'> <'timeline-trigger-active-range-end'>? ]#",
 			"timeline-trigger-active-range-end": "[ auto | normal | <length-percentage> | <timeline-range-name> <length-percentage>? ]#",
 			"timeline-trigger-active-range-start": "[ auto | normal | <length-percentage> | <timeline-range-name> <length-percentage>? ]#",
+			"timeline-trigger-source": "[ none | auto | [ <dashed-ident> | <scroll()> | <view()> ]+ ]#",
 			"transform-origin": "[ left | center | right | top | bottom | <length-percentage> ] | [ left | center | right | <length-percentage> ] [ top | center | bottom | <length-percentage> ] <length>? | [ [ center | left | right ] && [ center | top | bottom ] ] <length>?",
 			"transition-duration": "<time [0s,∞]>#",
 			"user-select": "auto | text | none | contain | all",
@@ -507,7 +508,7 @@
 			"white-space": "normal | pre | pre-wrap | pre-line | [ <'white-space-collapse'> || <'text-wrap'> || <'white-space-trim'> ]",
 			"white-space-collapse": "collapse | discard | preserve | preserve-breaks | preserve-spaces | break-spaces",
 			"widows": "<integer [1,∞]>",
-			"width": "auto | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> ) | <-non-standard-size>",
+			"width": "auto | <box-size> | <anchor-size()> | <-non-standard-size>",
 			"window-drag": "none | move",
 			"word-break": "| manual",
 			"word-space-transform": "none | [ space | ideographic-space ] && auto-phrase?",
@@ -555,7 +556,7 @@
 			"bg-position": "<position> | <position-three>",
 			"blend-mode": "normal | multiply | screen | overlay | darken | lighten | color-dodge | color-burn | soft-light | hard-light | difference | exclusion | hue | saturation | color | luminosity",
 			"border-radius": "<slash-separated-border-radius-syntax> | <legacy-border-radius-syntax>",
-			"box-size": "<length-percentage> | stretch | contain | min-content | max-content | fit-content | <fit-content()> | <calc-size()>",
+			"box-size": "<length-percentage [0,∞]> | stretch | contain | min-content | max-content | fit-content | fit-content( <length-percentage [0,∞]> ) | <calc-size()>",
 			"calc-interpolate()": "calc-interpolate( [ <progress-source> && [ by <easing-function> ]? && <easing-function>? ] , <input-position>{1,2} : <calc-sum> , [ <easing-function>? , <input-position>{1,2} : <calc-sum> ]#? )",
 			"calc-keyword": "e | pi | infinity | -infinity | NaN",
 			"calc-mix()": "calc-mix( [ <calc-sum> <percentage [0,100]>? ]# )",
@@ -580,7 +581,7 @@
 			"composite-mode": "clear | copy | source-over | destination-over | source-in | destination-in | source-out | destination-out | source-atop | destination-atop | xor | lighter | plus-darker | plus-lighter",
 			"container-condition": "[ <container-name>? <container-query>? ]!",
 			"content-level": "element | content | text | <attr()> | <counter>",
-			"content-list": "[ <string> | contents | <image> | <counter> | <quote> | <target> | <leader()> | <attr()> | <string()> | <content()> ]+",
+			"content-list": "[ <string> | contents | <image> | <counter> | <quote> | <target> | <leader()> | <attr()> | <string()> | <content()> | <symbolic-counter-style> ]+",
 			"content()": "content( [ text | before | after | first-letter | marker ]? )",
 			"contrast-color()": "contrast-color( <color> )",
 			"control-point": "[ <position> | <relative-control-point> ]",
@@ -598,6 +599,7 @@
 			"cycle()": "cycle( <whole-value># )",
 			"default-value": "<declaration-value>",
 			"deprecated-color": "ActiveBorder | ActiveCaption | AppWorkspace | Background | ButtonHighlight | ButtonShadow | CaptionText | InactiveBorder | InactiveCaption | InactiveCaptionText | InfoBackground | InfoText | Menu | MenuText | Scrollbar | ThreeDDarkShadow | ThreeDFace | ThreeDHighlight | ThreeDLightShadow | ThreeDShadow | Window | WindowFrame | WindowText",
+			"dynamic-range-limit-mix()": "dynamic-range-limit-mix( [ <'dynamic-range-limit'> && <percentage [0,100]> ]# )",
 			"element()": "element( <id-selector> )",
 			"env-args": "env( <declaration-value> , <declaration-value>? )",
 			"env()": "env( <custom-ident> <integer [0,∞]>* , <declaration-value>? )",
@@ -730,7 +732,9 @@
 			"page-selector": "[ <ident-token>? <pseudo-page>* ]!",
 			"page-selector-list": "<page-selector>#",
 			"paint": "none | <color> | <url> [ none | <color> ]? | context-fill | context-stroke | <image> | <svg-paint>",
-			"param()": "param( <dashed-ident> , <declaration-value>? )",
+			"palette-mix()": "palette-mix( <color-interpolation-method>? , [ <'font-palette'> && <percentage [0,100]>? ]# )",
+			"param-spec": "color | accent-color | [ <dashed-ident> <css-type>? ]",
+			"param()": "param( <param-spec> , <declaration-value>? )",
 			"pattern-descriptor": "pattern : <url-pattern()>",
 			"pointer-axis": "block | inline | x | y",
 			"pointer-source": "root | nearest | self",
@@ -788,7 +792,9 @@
 			"shape-command": "<move-command> | <line-command> | close | <horizontal-line-command> | <vertical-line-command> | <curve-command> | <smooth-command> | <arc-command>",
 			"shape()": "shape( <'fill-rule'>? from <position> , <shape-command># )",
 			"sibling-count": "sibling-count( )",
+			"sibling-count()": "sibling-count( )",
 			"sibling-index": "sibling-index( )",
+			"sibling-index()": "sibling-index( )",
 			"single-animation": "<'animation-duration'> || <easing-function> || <'animation-delay-start'> || <single-animation-iteration-count> || <single-animation-direction> || <single-animation-fill-mode> || <single-animation-play-state> || [ none | <keyframes-name> ] || <single-animation-timeline>",
 			"single-animation-iteration-count": "infinite | <number [0,∞]>",
 			"size-keyword": "auto | max-content | min-content | stretch",
@@ -823,6 +829,7 @@
 			"supports-named-feature-fn": "named-feature( <ident> )",
 			"supports()": "supports( <declaration> )",
 			"svg-paint": "child | child( <integer> )",
+			"symbolic-counter-style": "disc | circle | square | disclosure-open | disclosure-closed",
 			"syntax-multiplier": "[ '#' | '+' ]",
 			"system-color": "AccentColor | AccentColorText | ActiveText | ButtonBorder | ButtonFace | ButtonText | Canvas | CanvasText | Field | FieldText | GrayText | Highlight | HighlightText | LinkText | Mark | MarkText | SelectedItem | SelectedItemText | VisitedText | <deprecated-color>",
 			"system-font-family-name": "caption | icon | menu | message-box | small-caption | status-bar",
diff --git a/packages/css-syntax-patches-for-csstree/package.json b/packages/css-syntax-patches-for-csstree/package.json
index 53d79f8fe..2341e631e 100644
--- a/packages/css-syntax-patches-for-csstree/package.json
+++ b/packages/css-syntax-patches-for-csstree/package.json
@@ -41,7 +41,7 @@
 		}
 	},
 	"devDependencies": {
-		"@webref/css": "^8.7.4",
+		"@webref/css": "^8.7.5",
 		"css-tree": "^3.2.1",
 		"postcss": "^8.5"
 	},
diff --git a/packages/css-syntax-patches-for-csstree/patches/webref-over-csstree-properties.json b/packages/css-syntax-patches-for-csstree/patches/webref-over-csstree-properties.json
index 7e8220b63..459c6b59f 100644
--- a/packages/css-syntax-patches-for-csstree/patches/webref-over-csstree-properties.json
+++ b/packages/css-syntax-patches-for-csstree/patches/webref-over-csstree-properties.json
@@ -405,8 +405,8 @@
 		"type": "modified",
 		"comment": "",
 		"syntax-b": "<'width'>",
-		"syntax-a": "auto | <box-size>",
-		"syntax-m": "auto | <box-size>",
+		"syntax-a": "auto | <box-size> | <anchor-size()>",
+		"syntax-m": "auto | <box-size> | <anchor-size()>",
 		"tests": {
 			"passing": [],
 			"failing": []
@@ -1828,8 +1828,8 @@
 		"type": "modified",
 		"comment": "",
 		"syntax-b": "auto | <length [0,∞]>",
-		"syntax-a": "auto | <length [0,∞]> | <box-size>",
-		"syntax-m": "auto | <length [0,∞]> | <box-size>",
+		"syntax-a": "auto | <box-size>",
+		"syntax-m": "auto | <box-size>",
 		"tests": {
 			"passing": [],
 			"failing": []
@@ -2777,8 +2777,8 @@
 		"type": "modified",
 		"comment": "",
 		"syntax-b": "auto | <length-percentage [0,∞]> | min-content | max-content | fit-content | fit-content( <length-percentage [0,∞]> ) | <calc-size()> | <anchor-size()> | stretch | <-non-standard-size>",
-		"syntax-a": "auto | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> )",
-		"syntax-m": "auto | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> ) | <-non-standard-size>",
+		"syntax-a": "auto | <box-size> | <anchor-size()>",
+		"syntax-m": "auto | <box-size> | <anchor-size()> | <-non-standard-size>",
 		"tests": {
 			"passing": [],
 			"failing": []
@@ -2898,8 +2898,8 @@
 		"type": "modified",
 		"comment": "",
 		"syntax-b": "<'width'>",
-		"syntax-a": "auto | <box-size>",
-		"syntax-m": "auto | <box-size>",
+		"syntax-a": "auto | <box-size> | <anchor-size()>",
+		"syntax-m": "auto | <box-size> | <anchor-size()>",
 		"tests": {
 			"passing": [],
 			"failing": []
@@ -3239,8 +3239,8 @@
 		"type": "modified",
 		"comment": "",
 		"syntax-b": "<'max-width'>",
-		"syntax-a": "none | <box-size>",
-		"syntax-m": "none | <box-size>",
+		"syntax-a": "none | <box-size> | <anchor-size()>",
+		"syntax-m": "none | <box-size> | <anchor-size()>",
 		"tests": {
 			"passing": [],
 			"failing": []
@@ -3250,8 +3250,8 @@
 		"type": "modified",
 		"comment": "",
 		"syntax-b": "none | <length-percentage [0,∞]> | min-content | max-content | fit-content | fit-content( <length-percentage [0,∞]> ) | <calc-size()> | <anchor-size()> | stretch | <-non-standard-size>",
-		"syntax-a": "none | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> )",
-		"syntax-m": "none | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> ) | <-non-standard-size>",
+		"syntax-a": "none | <box-size> | <anchor-size()>",
+		"syntax-m": "none | <box-size> | <anchor-size()> | <-non-standard-size>",
 		"tests": {
 			"passing": [],
 			"failing": []
@@ -3261,8 +3261,8 @@
 		"type": "modified",
 		"comment": "",
 		"syntax-b": "<'max-width'>",
-		"syntax-a": "none | <box-size>",
-		"syntax-m": "none | <box-size>",
+		"syntax-a": "none | <box-size> | <anchor-size()>",
+		"syntax-m": "none | <box-size> | <anchor-size()>",
 		"tests": {
 			"passing": [],
 			"failing": []
@@ -3294,8 +3294,8 @@
 		"type": "modified",
 		"comment": "",
 		"syntax-b": "none | <length-percentage [0,∞]> | min-content | max-content | fit-content | fit-content( <length-percentage [0,∞]> ) | <calc-size()> | <anchor-size()> | stretch | <-non-standard-size>",
-		"syntax-a": "none | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> )",
-		"syntax-m": "none | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> ) | <-non-standard-size>",
+		"syntax-a": "none | <box-size> | <anchor-size()>",
+		"syntax-m": "none | <box-size> | <anchor-size()> | <-non-standard-size>",
 		"tests": {
 			"passing": [],
 			"failing": []
@@ -3305,8 +3305,8 @@
 		"type": "modified",
 		"comment": "",
 		"syntax-b": "<'min-width'>",
-		"syntax-a": "auto | <box-size>",
-		"syntax-m": "auto | <box-size>",
+		"syntax-a": "auto | <box-size> | <anchor-size()>",
+		"syntax-m": "auto | <box-size> | <anchor-size()>",
 		"tests": {
 			"passing": [],
 			"failing": []
@@ -3316,8 +3316,8 @@
 		"type": "modified",
 		"comment": "",
 		"syntax-b": "auto | <length-percentage [0,∞]> | min-content | max-content | fit-content | fit-content( <length-percentage [0,∞]> ) | <calc-size()> | <anchor-size()> | stretch | <-non-standard-size>",
-		"syntax-a": "auto | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> )",
-		"syntax-m": "auto | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> ) | <-non-standard-size>",
+		"syntax-a": "auto | <box-size> | <anchor-size()>",
+		"syntax-m": "auto | <box-size> | <anchor-size()> | <-non-standard-size>",
 		"tests": {
 			"passing": [],
 			"failing": []
@@ -3327,8 +3327,8 @@
 		"type": "modified",
 		"comment": "",
 		"syntax-b": "<'min-width'>",
-		"syntax-a": "auto | <box-size>",
-		"syntax-m": "auto | <box-size>",
+		"syntax-a": "auto | <box-size> | <anchor-size()>",
+		"syntax-m": "auto | <box-size> | <anchor-size()>",
 		"tests": {
 			"passing": [],
 			"failing": []
@@ -3360,8 +3360,8 @@
 		"type": "modified",
 		"comment": "",
 		"syntax-b": "auto | <length-percentage [0,∞]> | min-content | max-content | fit-content | fit-content( <length-percentage [0,∞]> ) | <calc-size()> | <anchor-size()> | stretch | <-non-standard-size>",
-		"syntax-a": "auto | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> )",
-		"syntax-m": "auto | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> ) | <-non-standard-size>",
+		"syntax-a": "auto | <box-size> | <anchor-size()>",
+		"syntax-m": "auto | <box-size> | <anchor-size()> | <-non-standard-size>",
 		"tests": {
 			"passing": [],
 			"failing": []
@@ -5165,6 +5165,17 @@
 			"failing": []
 		}
 	},
+	"timeline-trigger-source": {
+		"type": "modified",
+		"comment": "",
+		"syntax-b": "<single-animation-timeline>#",
+		"syntax-a": "[ none | auto | [ <dashed-ident> | <scroll()> | <view()> ]+ ]#",
+		"syntax-m": "[ none | auto | [ <dashed-ident> | <scroll()> | <view()> ]+ ]#",
+		"tests": {
+			"passing": [],
+			"failing": []
+		}
+	},
 	"transform-origin": {
 		"type": "modified",
 		"comment": "",
@@ -5390,8 +5401,8 @@
 		"type": "modified",
 		"comment": "",
 		"syntax-b": "auto | <length-percentage [0,∞]> | min-content | max-content | fit-content | fit-content( <length-percentage [0,∞]> ) | <calc-size()> | <anchor-size()> | stretch | <-non-standard-size>",
-		"syntax-a": "auto | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> )",
-		"syntax-m": "auto | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> ) | <-non-standard-size>",
+		"syntax-a": "auto | <box-size> | <anchor-size()>",
+		"syntax-m": "auto | <box-size> | <anchor-size()> | <-non-standard-size>",
 		"tests": {
 			"passing": [],
 			"failing": []
diff --git a/packages/css-syntax-patches-for-csstree/patches/webref-over-csstree-types.json b/packages/css-syntax-patches-for-csstree/patches/webref-over-csstree-types.json
index 7834f0b55..6fab808b8 100644
--- a/packages/css-syntax-patches-for-csstree/patches/webref-over-csstree-types.json
+++ b/packages/css-syntax-patches-for-csstree/patches/webref-over-csstree-types.json
@@ -374,8 +374,8 @@
 		"type": "added",
 		"comment": "",
 		"syntax-b": "",
-		"syntax-a": "<length-percentage> | stretch | contain | min-content | max-content | fit-content | fit-content( ) | calc-size( )",
-		"syntax-m": "<length-percentage> | stretch | contain | min-content | max-content | fit-content | <fit-content()> | <calc-size()>",
+		"syntax-a": "<length-percentage [0,∞]> | stretch | contain | min-content | max-content | fit-content | fit-content( <length-percentage [0,∞]> ) | <calc-size()>",
+		"syntax-m": "<length-percentage [0,∞]> | stretch | contain | min-content | max-content | fit-content | fit-content( <length-percentage [0,∞]> ) | <calc-size()>",
 		"tests": {
 			"passing": [],
 			"failing": []
@@ -761,8 +761,8 @@
 		"type": "modified",
 		"comment": "",
 		"syntax-b": "[ <string> | contents | <image> | <counter> | <quote> | <target> | <leader()> | <attr()> ]+",
-		"syntax-a": "[ <string> | <image> | <attr()> | contents | <quote> | <leader()> | <target> | <string()> | <content()> | <counter> ]+",
-		"syntax-m": "[ <string> | contents | <image> | <counter> | <quote> | <target> | <leader()> | <attr()> | <string()> | <content()> ]+",
+		"syntax-a": "[ <string> | <image> | <attr()> | contents | <quote> | <leader()> | <target> | <string()> | <content()> | <counter> | <symbolic-counter-style> ]+",
+		"syntax-m": "[ <string> | contents | <image> | <counter> | <quote> | <target> | <leader()> | <attr()> | <string()> | <content()> | <symbolic-counter-style> ]+",
 		"tests": {
 			"passing": [
 				{
@@ -1060,6 +1060,17 @@
 			"failing": []
 		}
 	},
+	"dynamic-range-limit-mix()": {
+		"type": "modified",
+		"comment": "",
+		"syntax-b": "dynamic-range-limit-mix( [ <'dynamic-range-limit'> && <percentage [0,100]> ]#{2,} )",
+		"syntax-a": "dynamic-range-limit-mix( [ <'dynamic-range-limit'> && <percentage [0,100]> ]# )",
+		"syntax-m": "dynamic-range-limit-mix( [ <'dynamic-range-limit'> && <percentage [0,100]> ]# )",
+		"tests": {
+			"passing": [],
+			"failing": []
+		}
+	},
 	"element()": {
 		"type": "modified",
 		"comment": "",
@@ -3114,12 +3125,34 @@
 			"failing": []
 		}
 	},
+	"palette-mix()": {
+		"type": "modified",
+		"comment": "",
+		"syntax-b": "palette-mix( <color-interpolation-method> , [ [ normal | light | dark | <palette-identifier> | <palette-mix()> ] && <percentage [0,100]>? ]#{2} )",
+		"syntax-a": "palette-mix( <color-interpolation-method>? , [ <'font-palette'> && <percentage [0,100]>? ]# )",
+		"syntax-m": "palette-mix( <color-interpolation-method>? , [ <'font-palette'> && <percentage [0,100]>? ]# )",
+		"tests": {
+			"passing": [],
+			"failing": []
+		}
+	},
+	"param-spec": {
+		"type": "added",
+		"comment": "",
+		"syntax-b": "",
+		"syntax-a": "color | accent-color | [ <dashed-ident> <css-type>? ]",
+		"syntax-m": "color | accent-color | [ <dashed-ident> <css-type>? ]",
+		"tests": {
+			"passing": [],
+			"failing": []
+		}
+	},
 	"param()": {
 		"type": "added",
 		"comment": "",
 		"syntax-b": "",
-		"syntax-a": "param( <dashed-ident> , <declaration-value>? )",
-		"syntax-m": "param( <dashed-ident> , <declaration-value>? )",
+		"syntax-a": "param( <param-spec> , <declaration-value>? )",
+		"syntax-m": "param( <param-spec> , <declaration-value>? )",
 		"tests": {
 			"passing": [],
 			"failing": []
@@ -3840,6 +3873,17 @@
 			"failing": []
 		}
 	},
+	"sibling-count()": {
+		"type": "added",
+		"comment": "",
+		"syntax-b": "",
+		"syntax-a": "sibling-count( )",
+		"syntax-m": "sibling-count( )",
+		"tests": {
+			"passing": [],
+			"failing": []
+		}
+	},
 	"sibling-index": {
 		"type": "added",
 		"comment": "",
@@ -3851,6 +3895,17 @@
 			"failing": []
 		}
 	},
+	"sibling-index()": {
+		"type": "added",
+		"comment": "",
+		"syntax-b": "",
+		"syntax-a": "sibling-index( )",
+		"syntax-m": "sibling-index( )",
+		"tests": {
+			"passing": [],
+			"failing": []
+		}
+	},
 	"single-animation": {
 		"type": "modified",
 		"comment": "",
@@ -4274,6 +4329,17 @@
 			"failing": []
 		}
 	},
+	"symbolic-counter-style": {
+		"type": "added",
+		"comment": "",
+		"syntax-b": "",
+		"syntax-a": "disc | circle | square | disclosure-open | disclosure-closed",
+		"syntax-m": "disc | circle | square | disclosure-open | disclosure-closed",
+		"tests": {
+			"passing": [],
+			"failing": []
+		}
+	},
 	"syntax-multiplier": {
 		"type": "modified",
 		"comment": "",
diff --git a/packages/css-syntax-patches-for-csstree/raw-data/webref-over-csstree-properties.json b/packages/css-syntax-patches-for-csstree/raw-data/webref-over-csstree-properties.json
index f33d6d069..7eeb747d1 100644
--- a/packages/css-syntax-patches-for-csstree/raw-data/webref-over-csstree-properties.json
+++ b/packages/css-syntax-patches-for-csstree/raw-data/webref-over-csstree-properties.json
@@ -128,7 +128,7 @@
 	"block-size": {
 		"type": "modified",
 		"syntax-b": "<'width'>",
-		"syntax-a": "auto | <box-size>",
+		"syntax-a": "auto | <box-size> | <anchor-size()>",
 		"comment": ""
 	},
 	"block-step": {
@@ -692,7 +692,7 @@
 	"column-width": {
 		"type": "modified",
 		"syntax-b": "auto | <length [0,∞]>",
-		"syntax-a": "auto | <length [0,∞]> | <box-size>",
+		"syntax-a": "auto | <box-size>",
 		"comment": ""
 	},
 	"contain": {
@@ -1190,7 +1190,7 @@
 	"height": {
 		"type": "modified",
 		"syntax-b": "auto | <length-percentage [0,∞]> | min-content | max-content | fit-content | fit-content( <length-percentage [0,∞]> ) | <calc-size()> | <anchor-size()> | stretch | <-non-standard-size>",
-		"syntax-a": "auto | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> )",
+		"syntax-a": "auto | <box-size> | <anchor-size()>",
 		"comment": ""
 	},
 	"hyphenate-limit-chars": {
@@ -1256,7 +1256,7 @@
 	"inline-size": {
 		"type": "modified",
 		"syntax-b": "<'width'>",
-		"syntax-a": "auto | <box-size>",
+		"syntax-a": "auto | <box-size> | <anchor-size()>",
 		"comment": ""
 	},
 	"inline-sizing": {
@@ -1442,19 +1442,19 @@
 	"max-block-size": {
 		"type": "modified",
 		"syntax-b": "<'max-width'>",
-		"syntax-a": "none | <box-size>",
+		"syntax-a": "none | <box-size> | <anchor-size()>",
 		"comment": ""
 	},
 	"max-height": {
 		"type": "modified",
 		"syntax-b": "none | <length-percentage [0,∞]> | min-content | max-content | fit-content | fit-content( <length-percentage [0,∞]> ) | <calc-size()> | <anchor-size()> | stretch | <-non-standard-size>",
-		"syntax-a": "none | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> )",
+		"syntax-a": "none | <box-size> | <anchor-size()>",
 		"comment": ""
 	},
 	"max-inline-size": {
 		"type": "modified",
 		"syntax-b": "<'max-width'>",
-		"syntax-a": "none | <box-size>",
+		"syntax-a": "none | <box-size> | <anchor-size()>",
 		"comment": ""
 	},
 	"max-lines": {
@@ -1472,25 +1472,25 @@
 	"max-width": {
 		"type": "modified",
 		"syntax-b": "none | <length-percentage [0,∞]> | min-content | max-content | fit-content | fit-content( <length-percentage [0,∞]> ) | <calc-size()> | <anchor-size()> | stretch | <-non-standard-size>",
-		"syntax-a": "none | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> )",
+		"syntax-a": "none | <box-size> | <anchor-size()>",
 		"comment": ""
 	},
 	"min-block-size": {
 		"type": "modified",
 		"syntax-b": "<'min-width'>",
-		"syntax-a": "auto | <box-size>",
+		"syntax-a": "auto | <box-size> | <anchor-size()>",
 		"comment": ""
 	},
 	"min-height": {
 		"type": "modified",
 		"syntax-b": "auto | <length-percentage [0,∞]> | min-content | max-content | fit-content | fit-content( <length-percentage [0,∞]> ) | <calc-size()> | <anchor-size()> | stretch | <-non-standard-size>",
-		"syntax-a": "auto | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> )",
+		"syntax-a": "auto | <box-size> | <anchor-size()>",
 		"comment": ""
 	},
 	"min-inline-size": {
 		"type": "modified",
 		"syntax-b": "<'min-width'>",
-		"syntax-a": "auto | <box-size>",
+		"syntax-a": "auto | <box-size> | <anchor-size()>",
 		"comment": ""
 	},
 	"min-intrinsic-sizing": {
@@ -1508,7 +1508,7 @@
 	"min-width": {
 		"type": "modified",
 		"syntax-b": "auto | <length-percentage [0,∞]> | min-content | max-content | fit-content | fit-content( <length-percentage [0,∞]> ) | <calc-size()> | <anchor-size()> | stretch | <-non-standard-size>",
-		"syntax-a": "auto | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> )",
+		"syntax-a": "auto | <box-size> | <anchor-size()>",
 		"comment": ""
 	},
 	"mix-blend-mode": {
@@ -2459,6 +2459,12 @@
 		"syntax-a": "[ auto | normal | <length-percentage> | <timeline-range-name> <length-percentage>? ]#",
 		"comment": ""
 	},
+	"timeline-trigger-source": {
+		"type": "modified",
+		"syntax-b": "<single-animation-timeline>#",
+		"syntax-a": "[ none | auto | [ <dashed-ident> | <scroll()> | <view()> ]+ ]#",
+		"comment": ""
+	},
 	"transform-origin": {
 		"type": "modified",
 		"syntax-b": "[ <length-percentage> | left | center | right | top | bottom ] | [ [ <length-percentage> | left | center | right ] && [ <length-percentage> | top | center | bottom ] ] <length>?",
@@ -2564,7 +2570,7 @@
 	"width": {
 		"type": "modified",
 		"syntax-b": "auto | <length-percentage [0,∞]> | min-content | max-content | fit-content | fit-content( <length-percentage [0,∞]> ) | <calc-size()> | <anchor-size()> | stretch | <-non-standard-size>",
-		"syntax-a": "auto | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> )",
+		"syntax-a": "auto | <box-size> | <anchor-size()>",
 		"comment": ""
 	},
 	"window-drag": {
diff --git a/packages/css-syntax-patches-for-csstree/raw-data/webref-over-csstree-types.json b/packages/css-syntax-patches-for-csstree/raw-data/webref-over-csstree-types.json
index 11ebabf42..288cf23f1 100644
--- a/packages/css-syntax-patches-for-csstree/raw-data/webref-over-csstree-types.json
+++ b/packages/css-syntax-patches-for-csstree/raw-data/webref-over-csstree-types.json
@@ -176,7 +176,7 @@
 	"box-size": {
 		"type": "added",
 		"syntax-b": "",
-		"syntax-a": "<length-percentage> | stretch | contain | min-content | max-content | fit-content | fit-content( ) | calc-size( )",
+		"syntax-a": "<length-percentage [0,∞]> | stretch | contain | min-content | max-content | fit-content | fit-content( <length-percentage [0,∞]> ) | <calc-size()>",
 		"comment": ""
 	},
 	"calc-interpolate()": {
@@ -326,7 +326,7 @@
 	"content-list": {
 		"type": "modified",
 		"syntax-b": "[ <string> | contents | <image> | <counter> | <quote> | <target> | <leader()> | <attr()> ]+",
-		"syntax-a": "[ <string> | <image> | <attr()> | contents | <quote> | <leader()> | <target> | <string()> | <content()> | <counter> ]+",
+		"syntax-a": "[ <string> | <image> | <attr()> | contents | <quote> | <leader()> | <target> | <string()> | <content()> | <counter> | <symbolic-counter-style> ]+",
 		"comment": ""
 	},
 	"content()": {
@@ -449,6 +449,12 @@
 		"syntax-a": "inline-block | inline-table | inline-flex | inline-grid",
 		"comment": ""
 	},
+	"dynamic-range-limit-mix()": {
+		"type": "modified",
+		"syntax-b": "dynamic-range-limit-mix( [ <'dynamic-range-limit'> && <percentage [0,100]> ]#{2,} )",
+		"syntax-a": "dynamic-range-limit-mix( [ <'dynamic-range-limit'> && <percentage [0,100]> ]# )",
+		"comment": ""
+	},
 	"element()": {
 		"type": "modified",
 		"syntax-b": "element( <custom-ident> , [ first | start | last | first-except ]? ) | element( <id-selector> )",
@@ -1259,10 +1265,22 @@
 		"syntax-a": "none | <image> | <svg-paint>",
 		"comment": ""
 	},
+	"palette-mix()": {
+		"type": "modified",
+		"syntax-b": "palette-mix( <color-interpolation-method> , [ [ normal | light | dark | <palette-identifier> | <palette-mix()> ] && <percentage [0,100]>? ]#{2} )",
+		"syntax-a": "palette-mix( <color-interpolation-method>? , [ <'font-palette'> && <percentage [0,100]>? ]# )",
+		"comment": ""
+	},
+	"param-spec": {
+		"type": "added",
+		"syntax-b": "",
+		"syntax-a": "color | accent-color | [ <dashed-ident> <css-type>? ]",
+		"comment": ""
+	},
 	"param()": {
 		"type": "added",
 		"syntax-b": "",
-		"syntax-a": "param( <dashed-ident> , <declaration-value>? )",
+		"syntax-a": "param( <param-spec> , <declaration-value>? )",
 		"comment": ""
 	},
 	"pattern-descriptor": {
@@ -1619,12 +1637,24 @@
 		"syntax-a": "sibling-count( )",
 		"comment": ""
 	},
+	"sibling-count()": {
+		"type": "added",
+		"syntax-b": "",
+		"syntax-a": "sibling-count( )",
+		"comment": ""
+	},
 	"sibling-index": {
 		"type": "added",
 		"syntax-b": "",
 		"syntax-a": "sibling-index( )",
 		"comment": ""
 	},
+	"sibling-index()": {
+		"type": "added",
+		"syntax-b": "",
+		"syntax-a": "sibling-index( )",
+		"comment": ""
+	},
 	"single-animation": {
 		"type": "modified",
 		"syntax-b": "<'animation-duration'> || <easing-function> || <'animation-delay'> || <single-animation-iteration-count> || <single-animation-direction> || <single-animation-fill-mode> || <single-animation-play-state> || [ none | <keyframes-name> ] || <single-animation-timeline>",
@@ -1841,6 +1871,12 @@
 		"syntax-a": "child | child( <integer> )",
 		"comment": ""
 	},
+	"symbolic-counter-style": {
+		"type": "added",
+		"syntax-b": "",
+		"syntax-a": "disc | circle | square | disclosure-open | disclosure-closed",
+		"comment": ""
+	},
 	"syntax-multiplier": {
 		"type": "modified",
 		"syntax-b": "'#' | '+'",
diff --git a/packages/css-syntax-patches-for-csstree/raw-data/webref-properties.json b/packages/css-syntax-patches-for-csstree/raw-data/webref-properties.json
index f5b5c6f98..738a89081 100644
--- a/packages/css-syntax-patches-for-csstree/raw-data/webref-properties.json
+++ b/packages/css-syntax-patches-for-csstree/raw-data/webref-properties.json
@@ -186,7 +186,7 @@
 		"syntax": "tb | rl | bt | lr"
 	},
 	"block-size": {
-		"syntax": "auto | <box-size>"
+		"syntax": "auto | <box-size> | <anchor-size()>"
 	},
 	"block-step": {
 		"syntax": "<'block-step-size'> || <'block-step-insert'> || <'block-step-align'> || <'block-step-round'>"
@@ -675,7 +675,7 @@
 		"syntax": "none | <integer [1,∞]> | all | auto"
 	},
 	"column-width": {
-		"syntax": "auto | <length [0,∞]> | <box-size>"
+		"syntax": "auto | <box-size>"
 	},
 	"column-wrap": {
 		"syntax": "auto | nowrap | wrap"
@@ -1212,7 +1212,7 @@
 		"syntax": "none | [ first || [ force-end | allow-end ] || last ]"
 	},
 	"height": {
-		"syntax": "auto | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> )"
+		"syntax": "auto | <box-size> | <anchor-size()>"
 	},
 	"-ms-high-contrast-adjust": {
 		"syntax": "auto | none"
@@ -1275,7 +1275,7 @@
 		"syntax": "none | first | all | grid | <length-percentage>"
 	},
 	"inline-size": {
-		"syntax": "auto | <box-size>"
+		"syntax": "auto | <box-size> | <anchor-size()>"
 	},
 	"inline-sizing": {
 		"syntax": "normal | stretch"
@@ -1551,13 +1551,13 @@
 		"syntax": "normal | compact"
 	},
 	"max-block-size": {
-		"syntax": "none | <box-size>"
+		"syntax": "none | <box-size> | <anchor-size()>"
 	},
 	"max-height": {
-		"syntax": "none | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> )"
+		"syntax": "none | <box-size> | <anchor-size()>"
 	},
 	"max-inline-size": {
-		"syntax": "none | <box-size>"
+		"syntax": "none | <box-size> | <anchor-size()>"
 	},
 	"max-lines": {
 		"syntax": "none | <integer [1,∞]>"
@@ -1566,16 +1566,16 @@
 		"syntax": "<'max-width'> <'max-height'>?"
 	},
 	"max-width": {
-		"syntax": "none | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> )"
+		"syntax": "none | <box-size> | <anchor-size()>"
 	},
 	"min-block-size": {
-		"syntax": "auto | <box-size>"
+		"syntax": "auto | <box-size> | <anchor-size()>"
 	},
 	"min-height": {
-		"syntax": "auto | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> )"
+		"syntax": "auto | <box-size> | <anchor-size()>"
 	},
 	"min-inline-size": {
-		"syntax": "auto | <box-size>"
+		"syntax": "auto | <box-size> | <anchor-size()>"
 	},
 	"min-intrinsic-sizing": {
 		"syntax": "legacy | zero-if-scroll || zero-if-extrinsic"
@@ -1584,7 +1584,7 @@
 		"syntax": "<'min-width'> <'min-height'>?"
 	},
 	"min-width": {
-		"syntax": "auto | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> )"
+		"syntax": "auto | <box-size> | <anchor-size()>"
 	},
 	"mix-blend-mode": {
 		"syntax": "<blend-mode> | plus-lighter"
@@ -2514,7 +2514,7 @@
 		"syntax": "[ normal | <length-percentage> | <timeline-range-name> <length-percentage>? ]#"
 	},
 	"timeline-trigger-source": {
-		"syntax": "<single-animation-timeline>#"
+		"syntax": "[ none | auto | [ <dashed-ident> | <scroll()> | <view()> ]+ ]#"
 	},
 	"top": {
 		"syntax": "auto | <length-percentage> | <anchor()> | <anchor-size()>"
@@ -2664,7 +2664,7 @@
 		"syntax": "<integer [1,∞]>"
 	},
 	"width": {
-		"syntax": "auto | <box-size> | <anchor-size()> | contain | fit-content( <length-percentage [0,∞]> )"
+		"syntax": "auto | <box-size> | <anchor-size()>"
 	},
 	"will-change": {
 		"syntax": "auto | <animateable-feature>#"
diff --git a/packages/css-syntax-patches-for-csstree/raw-data/webref-types.json b/packages/css-syntax-patches-for-csstree/raw-data/webref-types.json
index cc56f4f21..7083fc931 100644
--- a/packages/css-syntax-patches-for-csstree/raw-data/webref-types.json
+++ b/packages/css-syntax-patches-for-csstree/raw-data/webref-types.json
@@ -186,7 +186,7 @@
 		"syntax": "<length> | auto"
 	},
 	"box-size": {
-		"syntax": "<length-percentage> | stretch | contain | min-content | max-content | fit-content | fit-content( ) | calc-size( )"
+		"syntax": "<length-percentage [0,∞]> | stretch | contain | min-content | max-content | fit-content | fit-content( <length-percentage [0,∞]> ) | <calc-size()>"
 	},
 	"brightness()": {
 		"syntax": "brightness( [ <number> | <percentage> ]? )"
@@ -363,7 +363,7 @@
 		"syntax": "element | content | text | <attr()> | <counter>"
 	},
 	"content-list": {
-		"syntax": "[ <string> | <image> | <attr()> | contents | <quote> | <leader()> | <target> | <string()> | <content()> | <counter> ]+"
+		"syntax": "[ <string> | <image> | <attr()> | contents | <quote> | <leader()> | <target> | <string()> | <content()> | <counter> | <symbolic-counter-style> ]+"
 	},
 	"content-position": {
 		"syntax": "center | start | end | flex-start | flex-end"
@@ -510,7 +510,7 @@
 		"syntax": "drop-shadow( [ <color>? && <length>{2,3} ] )"
 	},
 	"dynamic-range-limit-mix()": {
-		"syntax": "dynamic-range-limit-mix( [ <'dynamic-range-limit'> && <percentage [0,100]> ]#{2,} )"
+		"syntax": "dynamic-range-limit-mix( [ <'dynamic-range-limit'> && <percentage [0,100]> ]# )"
 	},
 	"easing-function": {
 		"syntax": "<linear-easing-function> | <cubic-bezier-easing-function> | <step-easing-function>"
@@ -1278,10 +1278,13 @@
 		"syntax": "<dashed-ident>"
 	},
 	"palette-mix()": {
-		"syntax": "palette-mix( <color-interpolation-method> , [ [ normal | light | dark | <palette-identifier> | <palette-mix()> ] && <percentage [0,100]>? ]#{2} )"
+		"syntax": "palette-mix( <color-interpolation-method>? , [ <'font-palette'> && <percentage [0,100]>? ]# )"
+	},
+	"param-spec": {
+		"syntax": "color | accent-color | [ <dashed-ident> <css-type>? ]"
 	},
 	"param()": {
-		"syntax": "param( <dashed-ident> , <declaration-value>? )"
+		"syntax": "param( <param-spec> , <declaration-value>? )"
 	},
 	"path()": {
 		"syntax": "path( <'fill-rule'>? , <string> )"
@@ -1613,9 +1616,15 @@
 	"sibling-count": {
 		"syntax": "sibling-count( )"
 	},
+	"sibling-count()": {
+		"syntax": "sibling-count( )"
+	},
 	"sibling-index": {
 		"syntax": "sibling-index( )"
 	},
+	"sibling-index()": {
+		"syntax": "sibling-index( )"
+	},
 	"side-or-corner": {
 		"syntax": "[ left | right ] || [ top | bottom ]"
 	},
@@ -1820,6 +1829,9 @@
 	"symbol": {
 		"syntax": "<string> | <image> | <custom-ident>"
 	},
+	"symbolic-counter-style": {
+		"syntax": "disc | circle | square | disclosure-open | disclosure-closed"
+	},
 	"symbols-type": {
 		"syntax": "cyclic | numeric | alphabetic | symbolic | fixed"
 	},
diff --git a/plugin-packs/postcss-preset-env/package.json b/plugin-packs/postcss-preset-env/package.json
index 9cdd4f7ad..deea837b1 100644
--- a/plugin-packs/postcss-preset-env/package.json
+++ b/plugin-packs/postcss-preset-env/package.json
@@ -130,7 +130,7 @@
 		"@csstools/pack-test": "*",
 		"@csstools/postcss-bundler": "*",
 		"@csstools/postcss-tape": "*",
-		"@webref/css": "^8.7.1"
+		"@webref/css": "^8.7.5"
 	},
 	"scripts": {
 		"prebuild": "node ./scripts/generate-plugins-data.mjs && eslint --fix ./src/plugins/*.mjs",
diff --git a/plugins/postcss-progressive-custom-properties/package.json b/plugins/postcss-progressive-custom-properties/package.json
index 4ea303fac..e1e07f706 100644
--- a/plugins/postcss-progressive-custom-properties/package.json
+++ b/plugins/postcss-progressive-custom-properties/package.json
@@ -38,7 +38,7 @@
 	},
 	"devDependencies": {
 		"@csstools/postcss-tape": "*",
-		"@webref/css": "^8.7.1"
+		"@webref/css": "^8.7.5"
 	},
 	"scripts": {
 		"build": "node ./scripts/matchers.mjs && node ./scripts/shorthands.mjs && eslint --fix ./src/matchers.ts ./src/shorthands.ts  && rollup -c ../../rollup/default.mjs",