diff --git a/.gitignore b/.gitignore
index 7d7b5bb..c61e293 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,7 +9,7 @@
 !.licignore
 !Makefile
 !run.sh
-!*.yaml
+!*.yml
 !Dockerfile
 
 # ...even if they are in subdirectories
diff --git a/action.yaml b/action.yml
similarity index 100%
rename from action.yaml
rename to action.yml