diff --git a/.github/workflows/compress-images-on-pull-request.yml b/.github/workflows/compress-images-on-pull-request.yml
index d094a667..e195bfca 100644
--- a/.github/workflows/compress-images-on-pull-request.yml
+++ b/.github/workflows/compress-images-on-pull-request.yml
@@ -1,8 +1,9 @@
 name: Compress images
-on: pull_request
-  paths:
-    - 'docs/**.jpg'
-    - 'docs/**.png'
+on:
+  pull_request:
+    paths:
+      - 'docs/**.jpg'
+      - 'docs/**.png'
 jobs:
   build:
     name: calibreapp/image-actions