diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 8fb72abd..d050a4f7 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -25,6 +25,7 @@ jobs:
     - name: Build docs
       run: |
         cd docs
+        sphinx-apidoc -o . ../kan
         make html
     # https://github.com/peaceiris/actions-gh-pages
     - name: Deploy