diff --git a/bento-pdf/compose.yaml b/bento-pdf/compose.yaml
index 3807c1d..378ed15 100644
--- a/bento-pdf/compose.yaml
+++ b/bento-pdf/compose.yaml
@@ -3,7 +3,7 @@ services:
     image: bentopdfteam/bentopdf-simple:latest
     container_name: bentopdf
     ports:
-      - "${CADDY_PORT:?"Caddy Port"}:8080"
+      - "${CADDY_PORT:?'Caddy Port'}:8080"
     volumes:
       - ./configs:/configs
       - ./data:/app/data