diff --git a/.github/workflows/typst.yml b/.github/workflows/typst.yml
index 1827f69..4bb5d3a 100644
--- a/.github/workflows/typst.yml
+++ b/.github/workflows/typst.yml
@@ -1,10 +1,9 @@
 name: Build Typst document
-on:
-  push: main
-  pull_request: main
+on: [push, pull_request]
 jobs:
   typst-build:
     runs-on: ubuntu-latest
+    if: ${{ github.ref == 'refs/heads/main' }}
     steps:
       - uses: actions/checkout@v3
       - name: Build Typst