diff --git a/doc-sphinx/conf.py b/doc-sphinx/conf.py
index 4ea415a5..e2e41f0e 100644
--- a/doc-sphinx/conf.py
+++ b/doc-sphinx/conf.py
@@ -31,7 +31,7 @@
 extensions = [
     'sphinx.ext.autodoc',
     'sphinx.ext.mathjax',
-    'sphinx.ext.napoleon',
+    'sphinxcontrib.napoleon',
     'sphinxcontrib.bibtex'
 ]