diff --git a/.github/workflows/sphinx.yml b/.github/workflows/sphinx.yml
index ca0de3e..00e5d97 100644
--- a/.github/workflows/sphinx.yml
+++ b/.github/workflows/sphinx.yml
@@ -2,9 +2,9 @@ name: Build documentation
 
 on:
   push:
-    branches: [ main ]
+    branches: [ master ]
   pull_request:
-    branches: [ main ]
+    branches: [ master ]
 
 permissions:
   contents: write