diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index 93e82f0b0..547fe5176 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -1,5 +1,9 @@
 name: Continuous integration
-on: [push]
+on:
+  pull_request:
+  push:
+    branches:
+      - main
 jobs:
   ci:
     runs-on: ubuntu-latest