diff --git a/.env.dev.docker b/.env.dev.docker
index 308a6ce0b1..d31d088706 100644
--- a/.env.dev.docker
+++ b/.env.dev.docker
@@ -16,7 +16,7 @@ APP_DEBUG=true
 APP_KEY=base64:3ilviXqB9u6DX1NRcyWGJ+sjySF+H18CPDGb3+IVwMQ=
 APP_URL=http://localhost:8000
 APP_TIMEZONE='UTC'
-APP_LOCALE=en
+APP_LOCALE=en-US
 MAX_RESULTS=500
 
 # --------------------------------------------