diff --git a/docs/requirements.txt b/docs/requirements.txt
index edabd76fdeb699b456a183105940aaf7c786f84e..a402aa770a08f3c301d04fb00f1b6eba690744e2 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,4 +1,6 @@
 sphinx-rtd-theme
+sphinxcontrib-napoleon
+sphinx-code-include
 numpy
 scipy
 scikit-image