diff --git a/.github/workflows/build_latex.yml b/.github/workflows/build_latex.yml
index c520b58..6f18bf0 100644
--- a/.github/workflows/build_latex.yml
+++ b/.github/workflows/build_latex.yml
@@ -1,5 +1,9 @@
 name: Build LaTeX document
-on: [push]
+on:
+  push:
+    branches:
+      master
+  pull_request:
 jobs:
   build_latex:
     runs-on: ubuntu-latest