diff --git a/config/settings/local.py b/config/settings/local.py
index c9b2e60..50581c9 100644
--- a/config/settings/local.py
+++ b/config/settings/local.py
@@ -27,7 +27,7 @@
 
 INTERNAL_IPS = ['127.0.0.1', '10.0.2.2', ]
 
-if os.environ.get('USE_DOCKER') == 'yes':
+if os.path.isfile('/.dockerenv'):
     ip = socket.gethostbyname(socket.gethostname())
     INTERNAL_IPS += [ip[:-1] + "1"]
 
diff --git a/docker-compose.yml b/docker-compose.yml
index ef3816d..ade46bb 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -24,7 +24,6 @@ services:
       - POSTGRES_PASSWORD=poznaj
       - POSTGRES_DB=poznajdb
       - DATABASE_URL=postgres://poznaj:poznaj@postgres:5432/poznajdb
-      - USE_DOCKER=yes
     volumes:
       - .:/app
     ports: