diff --git a/docker-compose.yml b/docker-compose.yml
index 53a1cf97..91f8bbda 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -112,7 +112,8 @@ services:
     read_only: true
     tmpfs:
       - /tmp:size=512m   # training endpoints write ZIPs to /tmp; 512 MB covers typical batches (20–50 images)
-    cap_drop: [ALL]
+    cap_drop:
+      - ALL
     security_opt:
       - no-new-privileges:true