diff --git a/docker-compose.yml b/docker-compose.yml
index 2cca335e..a68cb811 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,4 +1,3 @@
-version: '3.9'
 services:
   postgres:
     image: postgres:10
@@ -7,9 +6,10 @@ services:
       POSTGRES_DB: acts_as_taggable_on
       POSTGRES_PASSWORD: postgres
     ports: ['5432:5432']
+
   mysql:
     image: mysql:8
     environment:
       MYSQL_ALLOW_EMPTY_PASSWORD: true
       MYSQL_DATABASE: acts_as_taggable_on
-    ports: ['3306:3306']
\ No newline at end of file
+    ports: ['3306:3306']