diff --git a/.github/workflows/documentation-ci.yml b/.github/workflows/documentation-ci.yml
index 061aad71099..0f041220ec9 100644
--- a/.github/workflows/documentation-ci.yml
+++ b/.github/workflows/documentation-ci.yml
@@ -1,6 +1,7 @@
 name: Documentation CI
 on:
   pull_request:
+    branches: ["main"]
     paths: ["docs/sources/**"]
   workflow_dispatch:
 jobs: