diff --git a/requirements.txt b/requirements.txt
index c6cb6fd47..5873f596c 100755
--- a/requirements.txt
+++ b/requirements.txt
@@ -46,6 +46,7 @@ pytz==2018.4
 regex==2018.2.21
 requests==2.18.4
 six==1.11.0
+scikit-learn==0.19.2
 termcolor==1.1.0
 text-unidecode==1.2
 tzlocal==1.5.1