diff --git a/.woodpecker.yml b/.woodpecker.yml
index b890e9a..1549a39 100644
--- a/.woodpecker.yml
+++ b/.woodpecker.yml
@@ -5,7 +5,7 @@ steps:
   build:
     image: docker
     environment:
-      - DOCKER_BUILDKIT=1
+      DOCKER_BUILDKIT: "1"
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock
     commands: