diff --git a/extensions/markdown-language-features/package-lock.json b/extensions/markdown-language-features/package-lock.json
index bdc9ad8f..dae79fb4 100644
--- a/extensions/markdown-language-features/package-lock.json
+++ b/extensions/markdown-language-features/package-lock.json
@@ -10,7 +10,7 @@
       "license": "MIT",
       "dependencies": {
         "@vscode/extension-telemetry": "^0.9.8",
-        "dompurify": "^3.2.7",
+        "dompurify": "^3.4.0",
         "highlight.js": "^11.8.0",
         "markdown-it": "13.0.2",
         "markdown-it-front-matter": "^0.2.4",
@@ -388,9 +388,9 @@
       }
     },
     "node_modules/dompurify": {
-      "version": "3.2.7",
-      "resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.2.7.tgz",
-      "integrity": "sha512-WhL/YuveyGXJaerVlMYGWhvQswa7myDG17P7Vu65EWC05o8vfeNbvNf4d/BOvH99+ZW+LlQsc1GDKMa1vNK6dw==",
+      "version": "3.4.0",
+      "resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.4.0.tgz",
+      "integrity": "sha512-nolgK9JcaUXMSmW+j1yaSvaEaoXYHwWyGJlkoCTghc97KgGDDSnpoU/PlEnw63Ah+TGKFOyY+X5LnxaWbCSfXg==",
       "license": "(MPL-2.0 OR Apache-2.0)",
       "optionalDependencies": {
         "@types/trusted-types": "^2.0.7"
diff --git a/extensions/markdown-language-features/package.json b/extensions/markdown-language-features/package.json
index 2bc35e3f..09290c80 100644
--- a/extensions/markdown-language-features/package.json
+++ b/extensions/markdown-language-features/package.json
@@ -767,7 +767,7 @@
   },
   "dependencies": {
     "@vscode/extension-telemetry": "^0.9.8",
-    "dompurify": "^3.2.7",
+    "dompurify": "^3.4.0",
     "highlight.js": "^11.8.0",
     "markdown-it": "13.0.2",
     "markdown-it-front-matter": "^0.2.4",