diff --git a/compose.yml b/compose.yml
index 4d99fd2..d556a0c 100644
--- a/compose.yml
+++ b/compose.yml
@@ -3,7 +3,7 @@ version: "3.8"
 
 services:
   app:
-    image: "boky/postfix"
+    image: "boky/postfix:v3.0.0"
     networks:
       - proxy
     healthcheck: