diff --git a/docs/conf.py b/docs/conf.py
index 3562850..2cdc8dd 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -35,4 +35,5 @@ autodoc_mock_imports = [
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output
 
 html_theme = 'sphinx_rtd_theme'
+html_theme_path = ["_themes", ]
 html_static_path = ['_static']
diff --git a/pyproject.toml b/pyproject.toml
index 4cbf39a..d81123b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -74,7 +74,8 @@ full = [
 
 docs = [
     "sphinx>=2.1",
-    "myst_parser"
+    "myst_parser",
+    "sphinx_rtd_theme"
 ]