diff --git a/core.py b/core.py
index 63df234..a2f91d0 100644
--- a/core.py
+++ b/core.py
@@ -11,7 +11,7 @@ app = Flask(__name__)
 db_user = environ.get('MYSQL_USER')
 db_password = environ.get('MYSQL_PASSWORD')
 db_name = environ.get('MYSQL_DATABASE')
-db_host = environ.get('MYSQL_HOSTNAME')
+db_host = environ.get('MYSQL_HOST')
 if not db_host or not db_user or not db_password or not db_name:
     print('Missing connection environment variables')
     exit()
diff --git a/docker-compose.yml b/docker-compose.yml
index 944ea90..c1d952d 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -13,7 +13,7 @@ services:
       MYSQL_USER: root
       MYSQL_PASSWORD: root
       MYSQL_DATABASE: www
-      MYSQL_HOSTNAME: db
+      MYSQL_HOST: db
       ADMIN_USERNAME: admin
       ADMIN_PASSWORD: secret
     volumes: