diff --git a/.github/workflows/sphinx.yml b/.github/workflows/sphinx.yml
index c3133fd..98d596c 100644
--- a/.github/workflows/sphinx.yml
+++ b/.github/workflows/sphinx.yml
@@ -4,10 +4,12 @@ on:
   push:
     branches: [main] # branch to trigger deployment
 
+inputs:
+  python_version: 3.8
+
 jobs:
   pages:
     runs-on: ubuntu-20.04
-    python_version: 3.8
     environment:
       name: github-pages
       url: ${{ steps.deployment.outputs.page_url }}