diff --git a/src/Fable.Cli/CHANGELOG.md b/src/Fable.Cli/CHANGELOG.md
index a1f83e8395..0f9ff4fbe8 100644
--- a/src/Fable.Cli/CHANGELOG.md
+++ b/src/Fable.Cli/CHANGELOG.md
@@ -1,5 +1,5 @@
 ---
-last_commit_released: 148f989e1b37b3f6560c3dda615b6a3a8efffcb8
+last_commit_released: a8661874d60694f0faad235adb7f760fed6f72a5
 include:
   - ../fable-library-beam/
   - ../fable-library-dart/
@@ -28,6 +28,19 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 5.21.0 - 2026-10-12
+
+### 🚀 Features
+
+* *(php)* System.Environment (#4782) ([a8661874](https://github.com/fable-compiler/Fable/commit/a8661874d60694f0faad235adb7f760fed6f72a5))
+
+### 🐞 Bug Fixes
+
+* *(all)* Support implicit conversion to erased unions (#5058) ([5d15141e](https://github.com/fable-compiler/Fable/commit/5d15141e519c2f320ac3457805b2d157cbea086f))
+* *(beam)* Preserve async cancellation and finalize resources once (#5057) ([617f7111](https://github.com/fable-compiler/Fable/commit/617f7111bf02f8536b321b4373bdffa7a0f7d633))
+
+<strong><small>[View changes on Github](https://github.com/fable-compiler/Fable/compare/148f989e1b37b3f6560c3dda615b6a3a8efffcb8..a8661874d60694f0faad235adb7f760fed6f72a5)</small></strong>
+
 ## 5.20.1 - 2026-10-12
 
 ### 🐞 Bug Fixes
diff --git a/src/Fable.Compiler/CHANGELOG.md b/src/Fable.Compiler/CHANGELOG.md
index 36dafa9ebf..9aa4b744e3 100644
--- a/src/Fable.Compiler/CHANGELOG.md
+++ b/src/Fable.Compiler/CHANGELOG.md
@@ -1,5 +1,5 @@
 ---
-last_commit_released: 148f989e1b37b3f6560c3dda615b6a3a8efffcb8
+last_commit_released: a8661874d60694f0faad235adb7f760fed6f72a5
 include:
   - ../fable-library-beam/
   - ../fable-library-dart/
@@ -21,6 +21,19 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 5.20.0 - 2026-10-12
+
+### 🚀 Features
+
+* *(php)* System.Environment (#4782) ([a8661874](https://github.com/fable-compiler/Fable/commit/a8661874d60694f0faad235adb7f760fed6f72a5))
+
+### 🐞 Bug Fixes
+
+* *(all)* Support implicit conversion to erased unions (#5058) ([5d15141e](https://github.com/fable-compiler/Fable/commit/5d15141e519c2f320ac3457805b2d157cbea086f))
+* *(beam)* Preserve async cancellation and finalize resources once (#5057) ([617f7111](https://github.com/fable-compiler/Fable/commit/617f7111bf02f8536b321b4373bdffa7a0f7d633))
+
+<strong><small>[View changes on Github](https://github.com/fable-compiler/Fable/compare/148f989e1b37b3f6560c3dda615b6a3a8efffcb8..a8661874d60694f0faad235adb7f760fed6f72a5)</small></strong>
+
 ## 5.19.1 - 2026-10-12
 
 ### 🐞 Bug Fixes
diff --git a/src/Fable.Transforms/Global/Compiler.fs b/src/Fable.Transforms/Global/Compiler.fs
index 1975606335..b54de2efec 100644
--- a/src/Fable.Transforms/Global/Compiler.fs
+++ b/src/Fable.Transforms/Global/Compiler.fs
@@ -2,7 +2,7 @@ namespace Fable
 
 module Literals =
     [<Literal>]
-    let VERSION = "5.20.1"
+    let VERSION = "5.21.0"
 
     [<Literal>]
     let JS_LIBRARY_VERSION = "2.8.1"
diff --git a/src/fable-compiler-js/CHANGELOG.md b/src/fable-compiler-js/CHANGELOG.md
index 9f621a87b6..769095d23d 100644
--- a/src/fable-compiler-js/CHANGELOG.md
+++ b/src/fable-compiler-js/CHANGELOG.md
@@ -1,5 +1,5 @@
 ---
-last_commit_released: 148f989e1b37b3f6560c3dda615b6a3a8efffcb8
+last_commit_released: a8661874d60694f0faad235adb7f760fed6f72a5
 include:
   - ../Fable.Core/
   - ../fable-standalone/
@@ -16,6 +16,15 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 3.8.1 - 2026-10-12
+
+### 🐞 Bug Fixes
+
+* *(all)* Support implicit conversion to erased unions (#5058) ([5d15141e](https://github.com/fable-compiler/Fable/commit/5d15141e519c2f320ac3457805b2d157cbea086f))
+* *(beam)* Preserve async cancellation and finalize resources once (#5057) ([617f7111](https://github.com/fable-compiler/Fable/commit/617f7111bf02f8536b321b4373bdffa7a0f7d633))
+
+<strong><small>[View changes on Github](https://github.com/fable-compiler/Fable/compare/148f989e1b37b3f6560c3dda615b6a3a8efffcb8..a8661874d60694f0faad235adb7f760fed6f72a5)</small></strong>
+
 ## 3.8.0 - 2026-10-12
 
 ### 🚀 Features
diff --git a/src/fable-compiler-js/package.json b/src/fable-compiler-js/package.json
index 3b43d76d9b..8d72702fc6 100644
--- a/src/fable-compiler-js/package.json
+++ b/src/fable-compiler-js/package.json
@@ -2,7 +2,7 @@
     "type": "module",
     "name": "@fable-org/fable-compiler-js",
     "private": false,
-    "version": "3.8.0",
+    "version": "3.8.1",
     "main": "index.js",
     "bin": {
         "fable": "index.js"
@@ -24,8 +24,8 @@
     },
     "homepage": "https://github.com/fable-compiler/Fable#readme",
     "dependencies": {
-        "@fable-org/fable-metadata": "^2.1.0",
-        "@fable-org/fable-standalone": "^3.7.1"
+        "@fable-org/fable-metadata": "^2.1.1",
+        "@fable-org/fable-standalone": "^3.7.2"
     },
     "devDependencies": {
         "esbuild": "^0.28.1",
diff --git a/src/fable-metadata/CHANGELOG.md b/src/fable-metadata/CHANGELOG.md
index 204c735579..7de1806b18 100644
--- a/src/fable-metadata/CHANGELOG.md
+++ b/src/fable-metadata/CHANGELOG.md
@@ -1,5 +1,5 @@
 ---
-last_commit_released: c977d78b39225a51c7bd051a1fe363ed0ccbe201
+last_commit_released: a8661874d60694f0faad235adb7f760fed6f72a5
 updaters:
   - package.json:
       file: package.json
@@ -15,6 +15,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 2.1.1 - 2026-10-12
+
+### 🐞 Bug Fixes
+
+* *(all)* Support implicit conversion to erased unions (#5058) ([5d15141e](https://github.com/fable-compiler/Fable/commit/5d15141e519c2f320ac3457805b2d157cbea086f))
+
+<strong><small>[View changes on Github](https://github.com/fable-compiler/Fable/compare/c977d78b39225a51c7bd051a1fe363ed0ccbe201..a8661874d60694f0faad235adb7f760fed6f72a5)</small></strong>
+
 ## 2.1.0 - 2026-06-30
 
 ### 🚀 Features
diff --git a/src/fable-metadata/package.json b/src/fable-metadata/package.json
index d7b04b7401..49ead91e6f 100644
--- a/src/fable-metadata/package.json
+++ b/src/fable-metadata/package.json
@@ -1,7 +1,7 @@
 {
     "name": "@fable-org/fable-metadata",
     "private": false,
-    "version": "2.1.0",
+    "version": "2.1.1",
     "description": "Assemblies needed to compile F# projects with Fable",
     "main": "index.js",
     "type": "module",
@@ -25,4 +25,4 @@
     "dependencies": {
         "dirname-filename-esm": "^1.1.1"
     }
-}
+}
\ No newline at end of file
diff --git a/src/fable-standalone/CHANGELOG.md b/src/fable-standalone/CHANGELOG.md
index a43a52ab4a..c3601aad4b 100644
--- a/src/fable-standalone/CHANGELOG.md
+++ b/src/fable-standalone/CHANGELOG.md
@@ -1,5 +1,5 @@
 ---
-last_commit_released: 148f989e1b37b3f6560c3dda615b6a3a8efffcb8
+last_commit_released: a8661874d60694f0faad235adb7f760fed6f72a5
 include:
   - ../Fable.Transforms/
   - ../fcs-fable/
@@ -20,6 +20,15 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 3.7.2 - 2026-10-12
+
+### 🐞 Bug Fixes
+
+* *(all)* Support implicit conversion to erased unions (#5058) ([5d15141e](https://github.com/fable-compiler/Fable/commit/5d15141e519c2f320ac3457805b2d157cbea086f))
+* *(beam)* Preserve async cancellation and finalize resources once (#5057) ([617f7111](https://github.com/fable-compiler/Fable/commit/617f7111bf02f8536b321b4373bdffa7a0f7d633))
+
+<strong><small>[View changes on Github](https://github.com/fable-compiler/Fable/compare/148f989e1b37b3f6560c3dda615b6a3a8efffcb8..a8661874d60694f0faad235adb7f760fed6f72a5)</small></strong>
+
 ## 3.7.1 - 2026-10-12
 
 ### 🐞 Bug Fixes
diff --git a/src/fable-standalone/package.json b/src/fable-standalone/package.json
index 8ef9f03e63..00ec7619fe 100644
--- a/src/fable-standalone/package.json
+++ b/src/fable-standalone/package.json
@@ -2,8 +2,8 @@
     "type": "module",
     "name": "@fable-org/fable-standalone",
     "private": false,
-    "version": "3.7.1",
-    "fableVersion": "5.20.1",
+    "version": "3.7.2",
+    "fableVersion": "5.21.0",
     "main": "./dist/bundle.min.js",
     "description": "Fable compiler",
     "keywords": [