diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index fea5472a7..718eecb7b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,5 +1,5 @@
 name: Build Project [using jupyter-book]
-on: [push]
+on: [pull_request]
 jobs:
   tests:
     runs-on: ubuntu-latest