diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2e854e9b..9c3debb7 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -35,7 +35,9 @@ jobs:
         run: poetry install --no-interaction --no-ansi --only docs
       # build package
       - name: Build package
-        run: python build.py
+        run: |
+          source .venv/bin/activate
+          python build.py
       # publish package
       - name: Publish to PyPI
         uses: pypa/gh-action-pypi-publish@release/v1
diff --git a/docs/gen_docs.py b/docs/gen_docs.py
index 31cc3359..354a2951 100644
--- a/docs/gen_docs.py
+++ b/docs/gen_docs.py
@@ -61,11 +61,11 @@ def generate_documentation(source: Path, discard_refs: bool = True):
     # generate reference documentation
     nav_items = _generate_reference(source / "validators/__init__.py", source / "docs/reference")
     # backup mkdocs config
-    _update_mkdocs_config(source / "mkdocs.yml", source / "mkdocs.bak.yml", nav_items)
+    _update_mkdocs_config(source / "mkdocs.yaml", source / "mkdocs.bak.yml", nav_items)
     # build docs as subprocess
     print(run(("mkdocs", "build"), capture_output=True).stderr.decode())
     # restore mkdocs config
-    move(str(source / "mkdocs.bak.yml"), source / "mkdocs.yml")
+    move(str(source / "mkdocs.bak.yml"), source / "mkdocs.yaml")
     # optionally discard reference folder
     if discard_refs:
         rmtree(source / "docs/reference")
diff --git a/mkdocs.yml b/mkdocs.yaml
similarity index 100%
rename from mkdocs.yml
rename to mkdocs.yaml