diff --git a/extensions/mermaid-chat-features/package-lock.json b/extensions/mermaid-chat-features/package-lock.json
index 26443f16e1a..d49d385f93a 100644
--- a/extensions/mermaid-chat-features/package-lock.json
+++ b/extensions/mermaid-chat-features/package-lock.json
@@ -9,7 +9,7 @@
       "version": "10.0.0",
       "license": "MIT",
       "dependencies": {
-        "dompurify": "^3.3.2",
+        "dompurify": "^3.4.0",
         "mermaid": "^11.12.3"
       },
       "devDependencies": {
@@ -974,13 +974,10 @@
       }
     },
     "node_modules/dompurify": {
-      "version": "3.3.2",
-      "resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.3.2.tgz",
-      "integrity": "sha512-6obghkliLdmKa56xdbLOpUZ43pAR6xFy1uOrxBaIDjT+yaRuuybLjGS9eVBoSR/UPU5fq3OXClEHLJNGvbxKpQ==",
+      "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)",
-      "engines": {
-        "node": ">=20"
-      },
       "optionalDependencies": {
         "@types/trusted-types": "^2.0.7"
       }
diff --git a/extensions/mermaid-chat-features/package.json b/extensions/mermaid-chat-features/package.json
index 551dc478460..3cd9b04b73e 100644
--- a/extensions/mermaid-chat-features/package.json
+++ b/extensions/mermaid-chat-features/package.json
@@ -130,7 +130,7 @@
     "@vscode/codicons": "^0.0.36"
   },
   "dependencies": {
-    "dompurify": "^3.3.2",
+    "dompurify": "^3.4.0",
     "mermaid": "^11.12.3"
   },
   "overrides": {