diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index 637c862ad..359b5d3c5 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -52,7 +52,7 @@
         "superagent": "^10.2.3",
         "tar": "6.2.1",
         "thirty-two": "^1.0.2",
-        "ua-parser-js": "^2.0.4"
+        "ua-parser-js": "1.0.40"
     },
     "devDependencies": {
         "@types/adm-zip": "^0.5.7",
@@ -68,6 +68,7 @@
         "@types/saslprep": "^1.0.3",
         "@types/semver": "^7.7.0",
         "@types/superagent": "^8.1.9",
+        "@types/ua-parser-js": "^0.7.39",
         "chokidar": "^4.0.3",
         "moment": "^2.30.1"
     }