diff --git a/extensions/markdown-language-features/package-lock.json b/extensions/markdown-language-features/package-lock.json
index 15fed36ad63190..ffd915de1bd91e 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": "^3.4.1",
+        "dompurify": "^3.4.11",
         "highlight.js": "^11.8.0",
         "markdown-it": "^12.3.2",
         "markdown-it-front-matter": "^0.2.4",
@@ -386,9 +386,9 @@
       }
     },
     "node_modules/dompurify": {
-      "version": "3.4.1",
-      "resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.4.1.tgz",
-      "integrity": "sha512-JahakDAIg1gyOm7dlgWSDjV4n7Ip2PKR55NIT6jrMfIgLFgWo81vdr1/QGqWtFNRqXP9UV71oVePtjqS2ebnPw==",
+      "version": "3.4.11",
+      "resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.4.11.tgz",
+      "integrity": "sha512-zhlUV12GsaRzMsf9q5M254YhA4+VuF0fG+QFqu6aYpoGlKtz+w8//jBcGVYBgQkR5GHjUomejY84AV+/uPbWdw==",
       "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 cd2e94bbb48b76..28b0c40eb5ecd6 100644
--- a/extensions/markdown-language-features/package.json
+++ b/extensions/markdown-language-features/package.json
@@ -857,7 +857,7 @@
   },
   "dependencies": {
     "@vscode/extension-telemetry": "^0.9.8",
-    "dompurify": "^3.4.1",
+    "dompurify": "^3.4.11",
     "highlight.js": "^11.8.0",
     "markdown-it": "^12.3.2",
     "markdown-it-front-matter": "^0.2.4",