diff --git a/.woodpecker/build.yml b/.woodpecker/build.yml
index 3fb2957..f823c74 100644
--- a/.woodpecker/build.yml
+++ b/.woodpecker/build.yml
@@ -125,8 +125,8 @@ services:
   pebble_acme:
     image: ghcr.io/letsencrypt/pebble:2.6.0
     ports:
-      - 80:14000  # ACME port
-      - 8080:15000  # Management port
+      - '80:14000'  # ACME port
+      - '8080:15000'  # Management port
     environment:
       PEBBLE_VA_NOSLEEP: '1'
       PEBBLE_VA_ALWAYS_VALID: '1'