diff --git a/src/frontend/package-lock.json b/src/frontend/package-lock.json
index 08b2a5fc..253c776e 100644
--- a/src/frontend/package-lock.json
+++ b/src/frontend/package-lock.json
@@ -18,7 +18,7 @@
         "@types/react-dom": "^19.2.3",
         "codemirror": "^6.0.2",
         "diff-match-patch": "^1.0.5",
-        "dompurify": "^3.4.0",
+        "dompurify": "^3.4.2",
         "i18next": "^26.0.6",
         "lucide-react": "^1.11.0",
         "marked": "18.0.2",
@@ -3561,9 +3561,9 @@
       "license": "MIT"
     },
     "node_modules/dompurify": {
-      "version": "3.4.0",
-      "resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.4.0.tgz",
-      "integrity": "sha512-nolgK9JcaUXMSmW+j1yaSvaEaoXYHwWyGJlkoCTghc97KgGDDSnpoU/PlEnw63Ah+TGKFOyY+X5LnxaWbCSfXg==",
+      "version": "3.4.2",
+      "resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.4.2.tgz",
+      "integrity": "sha512-lHeS9SA/IKeIFFyYciHBr2n0v1VMPlSj843HdLOwjb2OxNwdq9Xykxqhk+FE42MzAdHvInbAolSE4mhahPpjXA==",
       "license": "(MPL-2.0 OR Apache-2.0)",
       "optionalDependencies": {
         "@types/trusted-types": "^2.0.7"
@@ -7493,7 +7493,7 @@
       "version": "6.0.3",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-6.0.3.tgz",
       "integrity": "sha512-y2TvuxSZPDyQakkFRPZHKFm+KKVqIisdg9/CZwm9ftvKXLP8NRWj38/ODjNbr43SsoXqNuAisEf1GdCxqWcdBw==",
-      "dev": true,
+      "devOptional": true,
       "license": "Apache-2.0",
       "bin": {
         "tsc": "bin/tsc",
diff --git a/src/frontend/package.json b/src/frontend/package.json
index c8ca45b0..a4673b30 100644
--- a/src/frontend/package.json
+++ b/src/frontend/package.json
@@ -31,7 +31,7 @@
     "@types/react-dom": "^19.2.3",
     "codemirror": "^6.0.2",
     "diff-match-patch": "^1.0.5",
-    "dompurify": "^3.4.0",
+    "dompurify": "^3.4.2",
     "i18next": "^26.0.6",
     "lucide-react": "^1.11.0",
     "marked": "18.0.2",