diff --git a/docker/.env.example b/docker/.env.example
index d9251f0..98db345 100644
--- a/docker/.env.example
+++ b/docker/.env.example
@@ -1,3 +1,4 @@
 BACKEND_URL=backend.example.com
 FRONTEND_URL=example.com
-SESSION_DOMAIN=.example.com
\ No newline at end of file
+SESSION_DOMAIN=.example.com
+APP_KEY=SOME-KEY
\ No newline at end of file