diff --git a/.drone.yml b/.drone.yml
index cd7ffcc..8f38e53 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -6,5 +6,6 @@ name: lint
 steps:
   - name: ShellCheck
     image: koalaman/shellcheck-alpine:0.7.1
-    commands: shellcheck pdf-optimize
+    commands:
+      - shellcheck pdf-optimize
 ...