diff --git a/src/microsoft-trydotnet-editor/package-lock.json b/src/microsoft-trydotnet-editor/package-lock.json
index 8f610c2c5..666752f56 100644
--- a/src/microsoft-trydotnet-editor/package-lock.json
+++ b/src/microsoft-trydotnet-editor/package-lock.json
@@ -16,7 +16,7 @@
       },
       "devDependencies": {
         "@testdeck/mocha": "^0.3.3",
-        "@types/chai": "5.0.1",
+        "@types/chai": "5.2.3",
         "@types/chai-as-promised": "^8.0.2",
         "@types/mocha": "^10.0.10",
         "@types/node": "^26.2.0",
@@ -739,12 +739,14 @@
       "dev": true
     },
     "node_modules/@types/chai": {
-      "version": "5.0.1",
-      "resolved": "https://registry.npmjs.org/@types/chai/-/chai-5.0.1.tgz",
-      "integrity": "sha512-5T8ajsg3M/FOncpLYW7sdOcD6yf4+722sze/tc4KQV0P8Z2rAr3SAuHCIkYmYpt8VbcQlnz8SxlOlPQYefe4cA==",
+      "version": "5.2.3",
+      "resolved": "https://registry.npmjs.org/@types/chai/-/chai-5.2.3.tgz",
+      "integrity": "sha512-Mw558oeA9fFbv65/y4mHtXDs9bPnFMZAL/jxdPFUpOHHIXX91mcgEHbS5Lahr+pwZFR8A7GQleRWeI6cGFC2UA==",
       "dev": true,
+      "license": "MIT",
       "dependencies": {
-        "@types/deep-eql": "*"
+        "@types/deep-eql": "*",
+        "assertion-error": "^2.0.1"
       }
     },
     "node_modules/@types/chai-as-promised": {
@@ -1466,6 +1468,16 @@
       "integrity": "sha512-8+9WqebbFzpX9OR+Wa6O29asIogeRMzcGtAINdpMHHyAg10f05aSFVBbcEqGf/PXw1EjAZ+q2/bEBg3DvurK3Q==",
       "dev": true
     },
+    "node_modules/assertion-error": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-2.0.1.tgz",
+      "integrity": "sha512-Izi8RQcffqCeNVgFigKli1ssklIbpHnCYc6AknXGYoB6grJqyeby7jv12JUQgmTAnIDnbck1uxksT4dzN3PWBA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12"
+      }
+    },
     "node_modules/balanced-match": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
diff --git a/src/microsoft-trydotnet-editor/package.json b/src/microsoft-trydotnet-editor/package.json
index 744b9a29d..2460067c0 100644
--- a/src/microsoft-trydotnet-editor/package.json
+++ b/src/microsoft-trydotnet-editor/package.json
@@ -24,7 +24,7 @@
   },
   "devDependencies": {
     "@testdeck/mocha": "^0.3.3",
-    "@types/chai": "5.0.1",
+    "@types/chai": "5.2.3",
     "@types/chai-as-promised": "^8.0.2",
     "@types/mocha": "^10.0.10",
     "@types/node": "^26.2.0",