diff --git a/.github/workflows/build_sphinx_docs.yml b/.github/workflows/build_sphinx_docs.yml
index aa4e47b..6ab535a 100644
--- a/.github/workflows/build_sphinx_docs.yml
+++ b/.github/workflows/build_sphinx_docs.yml
@@ -1,6 +1,9 @@
 name: build_sphinx_docs
 on: 
   workflow_dispatch:
+  pull_request:
+    branches:
+      - main
 
 jobs:
   build-documentation: