diff --git a/.github/workflows/app-ci.yml b/.github/workflows/app-ci.yml
index 73499eb..565cf9b 100644
--- a/.github/workflows/app-ci.yml
+++ b/.github/workflows/app-ci.yml
@@ -8,7 +8,7 @@ on:
 
 jobs:
   build:
-    name: Build and lint app on Node ${{ matrix.node }} and ${{ matrix.os }}
+    name: Build and lint app on Node 15 and ${{ matrix.os }}
     defaults:
       run:
         working-directory: ./app
@@ -16,10 +16,6 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        node:
-          - '14.x'
-          - '15.x'
-          - '16.x'
         os:
           - ubuntu-latest
           - windows-latest
@@ -32,10 +28,10 @@ jobs:
           ref: ${{ github.head_ref }}
           fetch-depth: 0
 
-      - name: Use Node ${{ matrix.node }}
+      - name: Use Node 15
         uses: actions/setup-node@v1
         with:
-          node-version: ${{ matrix.node }}
+          node-version: '15'
 
       - name: Get yarn cache directory path
         id: yarn-cache-dir-path
@@ -50,6 +46,9 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-yarn-
 
+      - name: Test path
+        run: ls
+
       - name: Lint
         run: yarn lint
 
diff --git a/app/src/server/routes/404.ts b/app/src/server/routes/404.ts
index 4f3b60f..98a3cdd 100644
--- a/app/src/server/routes/404.ts
+++ b/app/src/server/routes/404.ts
@@ -4,6 +4,6 @@ const router = Router();
 
 router.use(json());
 
-router.use((_req, res) => res.send([false, `${_req.path} does not exist`, 404]));
+router.use((req, res) => res.send([false, `${req.path} does not exist`, 404]));
 
 export default router;