diff --git a/docker-compose-javaworker.yml b/docker-compose-javaworker.yml
index 6d20494..544865b 100644
--- a/docker-compose-javaworker.yml
+++ b/docker-compose-javaworker.yml
@@ -41,6 +41,9 @@ services:
   db:
     image: postgres:9.4
     container_name: db
+    environment:
+      POSTGRES_USER: "postgres"
+      POSTGRES_PASSWORD: "postgres"
     volumes:
       - "db-data:/var/lib/postgresql/data"
     networks:
diff --git a/docker-compose-k8s.yml b/docker-compose-k8s.yml
index 5a65415..4789742 100644
--- a/docker-compose-k8s.yml
+++ b/docker-compose-k8s.yml
@@ -7,6 +7,9 @@ services:
       - "6379:6379"
   db:
     image: postgres:9.4
+    environment:
+      POSTGRES_USER: "postgres"
+      POSTGRES_PASSWORD: "postgres"
     ports:
       - "5432:5432"
   vote:
diff --git a/docker-compose-simple.yml b/docker-compose-simple.yml
index 5834881..f8454ef 100644
--- a/docker-compose-simple.yml
+++ b/docker-compose-simple.yml
@@ -18,6 +18,9 @@ services:
 
   db:
     image: postgres:9.4
+    environment:
+      POSTGRES_USER: "postgres"
+      POSTGRES_PASSWORD: "postgres"
 
   result:
     build: ./result