diff --git a/postgresql/docker-compose.yaml b/postgresql/docker-compose.yaml
index 829c26b..7e0c425 100644
--- a/postgresql/docker-compose.yaml
+++ b/postgresql/docker-compose.yaml
@@ -1,4 +1,4 @@
-version: 3.8
+version: "3.8"
 
 services:
   postgresql: