diff --git a/.github/workflows/sphinx.yml b/.github/workflows/sphinx.yml
index 6809dfd..0550745 100644
--- a/.github/workflows/sphinx.yml
+++ b/.github/workflows/sphinx.yml
@@ -12,11 +12,12 @@ jobs:
       - uses: actions/setup-python@v3
       - name: Install dependencies
         run: |
-
           pip install sphinx sphinx_rtd_theme
+          poetry install
       - name: Sphinx build
         run: |
           cd docs
+          make clean
           make html
       - name: Deploy to Github Pages
         uses: peaceiris/actions-gh-pages@v3
@@ -24,5 +25,5 @@ jobs:
         with:
           publish_branch: gh-pages
           github_token: ${{ secrets.GITHUB_TOKEN }} # the default token which no need create
-          publish_dir: docs/build/html # the path of doc
+          publish_dir: docs/build/html # A source directory to deploy to GitHub Pages (the path of doc)
           force_orphan: true
diff --git a/docs/source/conf.py b/docs/source/conf.py
index cac6681..4ee9af8 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -4,8 +4,10 @@
 # https://www.sphinx-doc.org/en/master/usage/configuration.html
 import os
 import sys
+from pathlib import Path
+
 sys.path.insert(0, os.path.abspath('../..'))
-sys.path.insert(0, os.path.abspath('../..//pyga4'))
+sys.path.insert(0, os.path.abspath('../../pyga4'))
 
 # -- Project information -----------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information