diff --git a/.github/workflows/build-documentation.yml b/.github/workflows/build-documentation.yml
index fce725f..9193e47 100644
--- a/.github/workflows/build-documentation.yml
+++ b/.github/workflows/build-documentation.yml
@@ -1,5 +1,5 @@
 name: Build documentation
-on: [push, workflow_dispatch]
+on: [push, workflow_dispatch, pull_request]
 jobs:
   build_pdf:
     runs-on: ubuntu-latest