diff --git a/extensions/ql-vscode/package-lock.json b/extensions/ql-vscode/package-lock.json
index ecb6aeb4d5a..316aa80f4d2 100644
--- a/extensions/ql-vscode/package-lock.json
+++ b/extensions/ql-vscode/package-lock.json
@@ -124,7 +124,7 @@
         "markdownlint-cli2-formatter-pretty": "^0.0.9",
         "npm-run-all": "^4.1.5",
         "patch-package": "^8.0.1",
-        "prettier": "^3.8.4",
+        "prettier": "^3.9.3",
         "storybook": "^10.4.6",
         "tar-stream": "^3.2.0",
         "through2": "^4.0.2",
@@ -24994,9 +24994,9 @@
       }
     },
     "node_modules/prettier": {
-      "version": "3.8.4",
-      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.8.4.tgz",
-      "integrity": "sha512-N2MylSdi48+5N/6S5j+maeHbUSIzzZ5uOcX5Hm4QpV8Dkb1HFjfAKTKX6yNPJQD9AhcT3ifHNB66tWTTJDi11Q==",
+      "version": "3.9.3",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.9.3.tgz",
+      "integrity": "sha512-HWmu+K+zvHNpaMfSnYeqdqrDbR16cuIXaPx8WoHaviQkDJh1/0BNtOZmHVQI5jc3wXv0H1yXc9wjvFdXh+n3hQ==",
       "dev": true,
       "license": "MIT",
       "bin": {
diff --git a/extensions/ql-vscode/package.json b/extensions/ql-vscode/package.json
index 82cf2fedad5..3a1ef68a0c7 100644
--- a/extensions/ql-vscode/package.json
+++ b/extensions/ql-vscode/package.json
@@ -2182,7 +2182,7 @@
     "markdownlint-cli2-formatter-pretty": "^0.0.9",
     "npm-run-all": "^4.1.5",
     "patch-package": "^8.0.1",
-    "prettier": "^3.8.4",
+    "prettier": "^3.9.3",
     "storybook": "^10.4.6",
     "tar-stream": "^3.2.0",
     "through2": "^4.0.2",