diff --git a/docker-compose.yml b/docker-compose.yml
index 8f31749c..0df48db2 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -2,9 +2,10 @@ version: "2"
 
 services:
   database:
-    image: postgres
+    image: postgres:12-alpine
     environment:
       PGDATA: /var/lib/postgresql/data/pgdata
+      POSTGRES_PASSWORD: mysecretpassword
   osem:
     build:
       context: .
diff --git a/docker-compose.yml.production-example b/docker-compose.yml.production-example
index f4f0c173..d58535d2 100644
--- a/docker-compose.yml.production-example
+++ b/docker-compose.yml.production-example
@@ -2,9 +2,10 @@ version: "2"
 
 services:
   production_database:
-    image: postgres
+    image: postgres:12-alpine
     environment:
       PGDATA: /var/lib/postgresql/data/pgdata
+      POSTGRES_PASSWORD: mysecretpassword
     volumes:
       - osem_production_database:/var/lib/postgresql/data/pgdata
   production_web: