diff --git a/postgres-postgis/Dockerfile b/postgres-postgis/Dockerfile
index 3b219f4..56ffb31 100644
--- a/postgres-postgis/Dockerfile
+++ b/postgres-postgis/Dockerfile
@@ -1,4 +1,5 @@
-FROM postgis/postgis:latest
+ARG POSTGRES_VERSION=alpine
+FROM postgis/postgis:${POSTGRES_VERSION}
 
 LABEL maintainer="Mahmoud Zalt <mahmoud@zalt.me>"