diff --git a/docker-compose.swarm.portainer.yml b/docker-compose.swarm.portainer.yml
index 4e30a94..3f90de0 100644
--- a/docker-compose.swarm.portainer.yml
+++ b/docker-compose.swarm.portainer.yml
@@ -116,7 +116,6 @@ services:
       JWT_SECRET: ${JWT_SECRET:-change-this-to-a-random-secret}
       JWT_EXPIRATION: ${JWT_EXPIRATION:-24h}
       BETTER_AUTH_SECRET: ${BETTER_AUTH_SECRET}
-      BETTER_AUTH_URL: ${BETTER_AUTH_URL:-}
       CSRF_SECRET: ${CSRF_SECRET}
       # External services
       OLLAMA_ENDPOINT: ${OLLAMA_ENDPOINT}