diff --git a/overlord/package.json b/overlord/package.json
index f76a0ee3..88cc544b 100644
--- a/overlord/package.json
+++ b/overlord/package.json
@@ -26,6 +26,7 @@
     "@ngx-loading-bar/core": "^5.1.0",
     "@ngx-loading-bar/http-client": "^5.1.0",
     "@ngx-loading-bar/router": "^5.1.0",
+    "@types/mousetrap": "1.6.3",
     "angular2-hotkeys": "^2.2.0",
     "core-js": "^3.6.5",
     "mathjs": "^7.3.0",