diff --git a/.github/workflows/backend-deploy.yml b/.github/workflows/backend-deploy.yml
index f4fe11f..6f8b4f8 100644
--- a/.github/workflows/backend-deploy.yml
+++ b/.github/workflows/backend-deploy.yml
@@ -68,6 +68,7 @@ jobs:
           script: |
             CURRENT_STATE=$(curl -s http://${{ secrets.BLUE_GREEN_HOST }}:${{ secrets.BLUE_GREEN_PORT }}/status)
             echo "The current state is $CURRENT_STATE"
+            docker image prune -f
             docker pull ${{ secrets.DOCKERHUB_USERNAME }}/git-challenge-backend:0.1
             if [ $CURRENT_STATE = "blue" ]; then
               docker run -d --name backend-green -p 8081:8080 \
@@ -111,9 +112,9 @@ jobs:
           password: ${{ secrets.NGINX_SSH_PASSWORD }}
           port: ${{ secrets.NGINX_SSH_PORT }}
           script: |
-            if [ $(cat /status) = "green" ]; then
-              sed -i 's/proxy_pass http:\/\/127.0.0.1:808[0-1];/proxy_pass http:\/\/127.0.0.1:8081;/' /etc/nginx/sites-available/default
+            if [ "$CURRENT_STATE" = "green" ]; then
+              sed -i 's/proxy_pass http:\/\/[a-zA-Z0-9\.\-]+:8080;/proxy_pass http:\/\/[a-zA-Z0-9\.\-]+:8081;/' /etc/nginx/sites-available/default
             else
-              sed -i 's/proxy_pass http:\/\/127.0.0.1:808[0-1];/proxy_pass http:\/\/127.0.0.1:8080;/' /etc/nginx/sites-available/default
+              sed -i 's/proxy_pass http:\/\/[a-zA-Z0-9\.\-]+:8081;/proxy_pass http:\/\/[a-zA-Z0-9\.\-]+:8080;/' /etc/nginx/sites-available/default
             fi
             sudo nginx -s reload
\ No newline at end of file