diff --git a/docs/requirements.txt b/docs/requirements.txt
index c5efde9..9763baf 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -3,4 +3,5 @@ numpy>=1.16.0
 pandas
 scikit-learn
 statistics
-metric_learn
\ No newline at end of file
+metric_learn
+sphinx_rtd_theme