diff --git a/spec.yaml b/spec.yaml
index 8f57e92..bc4d682 100644
--- a/spec.yaml
+++ b/spec.yaml
@@ -27,6 +27,9 @@ services:
     routes:
       - path: /
     envs:
+      - key: APP_APPLICATION__BASE_URL
+        scope: RUN_TIME
+        value: ${_self.APP_URL}
       - key: APP_DATABASE__USERNAME
         scope: RUN_TIME
         value: ${newsletter.USERNAME}