diff --git a/docs/conf.py b/docs/conf.py
index 6ab5959d5..935c3c9a1 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -27,6 +27,7 @@ sys.path.insert(0, path.dirname(path.dirname(__file__)))
 # Add any Sphinx extension module names here, as strings. They can be extensions
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
 extensions = [
+    'notfound.extension',
     'scrapydocs',
     'sphinx.ext.autodoc',
     'sphinx.ext.coverage',
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 379da9994..f9db85146 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,2 +1,3 @@
 Sphinx>=2.1
-sphinx_rtd_theme
\ No newline at end of file
+sphinx-notfound-page
+sphinx_rtd_theme