diff --git a/README.md b/README.md
index 596513c3..2176cc6b 100644
--- a/README.md
+++ b/README.md
@@ -172,7 +172,7 @@ example-runnerdeploy2475ht2qbr   mumoshu/actions-runner-controller-ci   Running
 
 You can pass details through the spec selector. Here's an eg. of what you may like to do:
 
-```
+```yaml
 apiVersion: actions.summerwind.dev/v1alpha1
 kind: RunnerDeployment
 metadata: