diff --git a/docker-compose.build.yml b/docker-compose.build.yml
index a4b5761..f5dfa8e 100644
--- a/docker-compose.build.yml
+++ b/docker-compose.build.yml
@@ -8,7 +8,7 @@ services:
       context: frontend
       dockerfile: Dockerfile
       args:
-        - PUBLIC_BACKEND_URL: ${PUBLIC_BACKEND_URL}
+        PUBLIC_BACKEND_URL: ${PUBLIC_BACKEND_URL}
 
   version_tag:
     extends: frontend