diff --git a/agent-arena/client/package-lock.json b/agent-arena/client/package-lock.json
index 3ce9c3ff9c4..e4eacad0469 100644
--- a/agent-arena/client/package-lock.json
+++ b/agent-arena/client/package-lock.json
@@ -21,7 +21,7 @@
         "bootstrap": "^5.3.3",
         "bootstrap-dark": "^1.0.3",
         "bootswatch": "^5.3.3",
-        "dompurify": "^3.1.6",
+        "dompurify": "^3.4.9",
         "react": "^18.0.0",
         "react-ace": "^12.0.0",
         "react-bootstrap": "^2.10.4",
@@ -7624,9 +7624,13 @@
       }
     },
     "node_modules/dompurify": {
-      "version": "3.1.6",
-      "resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.1.6.tgz",
-      "integrity": "sha512-cTOAhc36AalkjtBpfG6O8JimdTMWNXjiePT2xQH/ppBGi/4uIpmj8eKyIkMJErXWARyINV/sB38yf8JCLF5pbQ=="
+      "version": "3.4.9",
+      "resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.4.9.tgz",
+      "integrity": "sha512-4dPSRMRDqHvs0V4YDFCsaIZo4if5u0xM+llyxiM2fwuZFdKArUBAF3VtI2+n8NKg9P870WMdYk0UhqQNoWXbfQ==",
+      "license": "(MPL-2.0 OR Apache-2.0)",
+      "optionalDependencies": {
+        "@types/trusted-types": "^2.0.7"
+      }
     },
     "node_modules/domutils": {
       "version": "2.8.0",
diff --git a/agent-arena/client/package.json b/agent-arena/client/package.json
index a463393c58b..b971e620cc0 100644
--- a/agent-arena/client/package.json
+++ b/agent-arena/client/package.json
@@ -16,7 +16,7 @@
     "bootstrap": "^5.3.3",
     "bootstrap-dark": "^1.0.3",
     "bootswatch": "^5.3.3",
-    "dompurify": "^3.1.6",
+    "dompurify": "^3.4.9",
     "react": "^18.0.0",
     "react-ace": "^12.0.0",
     "react-bootstrap": "^2.10.4",