diff --git a/packages/backend-app-api/package.json b/packages/backend-app-api/package.json
index 93230341df..abbcdf4201 100644
--- a/packages/backend-app-api/package.json
+++ b/packages/backend-app-api/package.json
@@ -43,7 +43,8 @@
     "winston": "^3.2.1"
   },
   "devDependencies": {
-    "@backstage/cli": "workspace:^"
+    "@backstage/cli": "workspace:^",
+    "@types/express": "^4.17.6"
   },
   "files": [
     "dist",
diff --git a/yarn.lock b/yarn.lock
index 41202619bc..ad653b416a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3382,6 +3382,7 @@ __metadata:
     "@backstage/cli": "workspace:^"
     "@backstage/errors": "workspace:^"
     "@backstage/plugin-permission-node": "workspace:^"
+    "@types/express": ^4.17.6
     express: ^4.17.1
     express-promise-router: ^4.1.0
     winston: ^3.2.1