diff --git a/dockerized/simple_site/docker-compose.yaml b/dockerized/simple_site/docker-compose.yaml
index 8b0c43d..d674ab3 100644
--- a/dockerized/simple_site/docker-compose.yaml
+++ b/dockerized/simple_site/docker-compose.yaml
@@ -12,7 +12,7 @@ services:
     environment:
       - APP_NAME=App1
     ports:
-      - ":3000"
+      - "3000"
     networks:
       - cluster
 
@@ -21,7 +21,7 @@ services:
     environment:
       - APP_NAME=App2
     ports:
-      - ":3000"
+      - "3000"
     networks:
       - cluster
 
@@ -30,7 +30,7 @@ services:
     environment:
       - APP_NAME=App3
     ports:
-      - ":3000"
+      - "3000"
     networks:
       - cluster