diff --git a/extensions/markdown-language-features/package.json b/extensions/markdown-language-features/package.json
index 1af496d0fce58..9bbd69ffd4878 100644
--- a/extensions/markdown-language-features/package.json
+++ b/extensions/markdown-language-features/package.json
@@ -499,7 +499,7 @@
   },
   "dependencies": {
     "@vscode/extension-telemetry": "0.4.10",
-    "dompurify": "^2.3.3",
+    "dompurify": "^2.4.2",
     "highlight.js": "^11.4.0",
     "markdown-it": "^12.3.2",
     "markdown-it-front-matter": "^0.2.1",
diff --git a/extensions/markdown-language-features/yarn.lock b/extensions/markdown-language-features/yarn.lock
index 5268b01f46cbd..b26fc1fa556ea 100644
--- a/extensions/markdown-language-features/yarn.lock
+++ b/extensions/markdown-language-features/yarn.lock
@@ -64,10 +64,10 @@ argparse@^2.0.1:
   resolved "https://registry.yarnpkg.com/argparse/-/argparse-2.0.1.tgz#246f50f3ca78a3240f6c997e8a9bd1eac49e4b38"
   integrity sha512-8+9WqebbFzpX9OR+Wa6O29asIogeRMzcGtAINdpMHHyAg10f05aSFVBbcEqGf/PXw1EjAZ+q2/bEBg3DvurK3Q==
 
-dompurify@^2.3.3:
-  version "2.3.3"
-  resolved "https://registry.yarnpkg.com/dompurify/-/dompurify-2.3.3.tgz#c1af3eb88be47324432964d8abc75cf4b98d634c"
-  integrity sha512-dqnqRkPMAjOZE0FogZ+ceJNM2dZ3V/yNOuFB7+39qpO93hHhfRpHw3heYQC7DPK9FqbQTfBKUJhiSfz4MvXYwg==
+dompurify@^2.4.2:
+  version "2.5.7"
+  resolved "https://registry.yarnpkg.com/dompurify/-/dompurify-2.5.7.tgz#6e0d36b9177db5a99f18ade1f28579db5ab839d7"
+  integrity sha512-2q4bEI+coQM8f5ez7kt2xclg1XsecaV9ASJk/54vwlfRRNQfDqJz2pzQ8t0Ix/ToBpXlVjrRIx7pFC/o8itG2Q==
 
 entities@~2.1.0:
   version "2.1.0"