diff --git a/docker/docker-compose.build.yml b/docker/docker-compose.build.yml
index c32186bad..959c9f524 100644
--- a/docker/docker-compose.build.yml
+++ b/docker/docker-compose.build.yml
@@ -1,4 +1,4 @@
-version: '3.7'
+version: '3.9'
 services:
   ghostfolio:
     build: ../
@@ -10,13 +10,13 @@ services:
       REDIS_HOST: 'redis'
       REDIS_PASSWORD: ${REDIS_PASSWORD}
     ports:
-      - 3333:3333
+      - "3333:3333"
     depends_on:
       postgres:
         condition: service_healthy
       redis:
         condition: service_healthy
-
+    
   postgres:
     image: postgres:12
     env_file:
diff --git a/docker/docker-compose.dev.yml b/docker/docker-compose.dev.yml
index 911d0dca4..fa0fdbb56 100644
--- a/docker/docker-compose.dev.yml
+++ b/docker/docker-compose.dev.yml
@@ -1,4 +1,4 @@
-version: '3.7'
+version: '3.9'
 services:
   postgres:
     image: postgres:12
@@ -7,7 +7,7 @@ services:
     env_file:
       - ../.env
     ports:
-      - 5432:5432
+      - "5432:5432"
     volumes:
       - postgres:/var/lib/postgresql/data
 
@@ -16,7 +16,7 @@ services:
     container_name: redis
     restart: unless-stopped
     ports:
-      - 6379:6379
+      - "6379:6379"
 
 volumes:
   postgres:
diff --git a/docker/docker-compose.yml b/docker/docker-compose.yml
index 2169fbcd8..a9dc72f2f 100644
--- a/docker/docker-compose.yml
+++ b/docker/docker-compose.yml
@@ -10,13 +10,13 @@ services:
       REDIS_HOST: 'redis'
       REDIS_PASSWORD: ${REDIS_PASSWORD}
     ports:
-      - 3333:3333
+      - "3333:3333"
     depends_on:
       postgres:
         condition: service_healthy
       redis:
         condition: service_healthy
-
+    
   postgres:
     image: postgres:12
     env_file: