diff --git a/docker-compose.yml b/docker-compose.yml
index 2889bce9b0..3b13fc46e6 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -74,7 +74,7 @@ services:
             CELERY_APP: ietf
             CELERY_ROLE: worker
             UPDATE_REQUIREMENTS_FROM: requirements.txt
-            DEV_MODE: yes
+            DEV_MODE: "yes"
         command:
             - '--loglevel=INFO'
         depends_on: