diff --git a/package.json b/package.json
index 17183e4..47f9981 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,8 @@
     "uuid": "^3.3.3"
   },
   "devDependencies": {
-    "@types/express": "^4.17.2",
+    "@types/express": "^4.17.6",
+    "@types/express-serve-static-core": "^4.17.5",
     "@types/fs-extra": "^8.0.0",
     "@types/helmet": "^0.0.45",
     "@types/ioredis": "^4.0.18",
diff --git a/src/api/Security.ts b/src/api/Security.ts
index 2dc019f..5488662 100644
--- a/src/api/Security.ts
+++ b/src/api/Security.ts
@@ -70,7 +70,7 @@ export default class Security {
       return req.headers.authorization.split(' ')[1];
     }
     if (req.query && req.query.token) {
-      return req.query.token;
+      return req.query.token as string;
     }
     return '0000000000';
   }