diff --git a/webui/package.json b/webui/package.json
index b9eac73..4fbe008 100644
--- a/webui/package.json
+++ b/webui/package.json
@@ -24,8 +24,11 @@
     "test:playwright": "playwright test -c playwright-ct.config.ts"
   },
   "dependencies": {
+    "@types/dompurify": "^3.2.0",
     "@xterm/addon-fit": "^0.10.0",
     "@xterm/xterm": "^5.5.0",
+    "dompurify": "^3.2.6",
+    "jsdom": "^26.1.0",
     "lit": "^3.2.1",
     "marked": "^15.0.7",
     "mermaid": "^11.6.0",