diff --git a/.github/workflows/deployment.yaml b/.github/workflows/deployment.yaml
index 467b7c5..1c7d267 100644
--- a/.github/workflows/deployment.yaml
+++ b/.github/workflows/deployment.yaml
@@ -67,8 +67,6 @@ jobs:
           image: us-central1-docker.pkg.dev/${{ secrets.PROJECT_ID }}/cloud-run/cloud-run-back:${{ env.IMAGE_VERSION }}
           region: us-central1
           project_id: ${{ secrets.PROJECT_ID }}
-          env_vars: |-
-            PORT=4000
 
       - name: Deploy to Cloud Run Frontend
         id: deploy-cloud-run-front
@@ -78,8 +76,6 @@ jobs:
           image: us-central1-docker.pkg.dev/${{ secrets.PROJECT_ID }}/cloud-run/cloud-run-front:${{ env.IMAGE_VERSION }}
           region: us-central1
           project_id: ${{ secrets.PROJECT_ID }}
-          env_vars: |-
-            PORT=80
 
       - name: Test Cloud Run
         run: |
diff --git a/back/index.ts b/back/index.ts
index 398c914..3dc4144 100644
--- a/back/index.ts
+++ b/back/index.ts
@@ -11,6 +11,6 @@ app.get('/api/hello', (_req: Request, res: Response) =>
   res.json({ message: 'hello' }),
 )
 
-app.listen(4000, () => {
-  console.info(`🚀 express http server started at http://localhost:${4000}`)
+app.listen(8080, () => {
+  console.info(`🚀 express http server started at http://localhost:${8080}`)
 })
diff --git a/nginx.conf b/nginx.conf
index 01c8716..2fdfa25 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -8,7 +8,7 @@ http {
   }
 
   server {
-    listen 80;
+    listen 8080;
     server_name _;
     index index.html index.htm;
 
@@ -25,4 +25,3 @@ http {
 events {
   worker_connections 1024;
 }
-