diff --git a/stack-definition.yml b/stack-definition.yml
index 0535458..109ddc5 100644
--- a/stack-definition.yml
+++ b/stack-definition.yml
@@ -6,7 +6,7 @@ services:
     volumes:
       - pchl:/app
     environment:
-      - PB_API:{{PB_API}}
+      - PB_API={{PB_API}}
     ports:
       - "19080:19080"
     deploy: