diff --git a/mlmodel/Requirements.txt b/mlmodel/Requirements.txt
index b3440f7..6dec84a 100644
--- a/mlmodel/Requirements.txt
+++ b/mlmodel/Requirements.txt
@@ -5,7 +5,7 @@ imagesize==0.7.1
 inflection==0.3.1
 Jinja2==2.9.6
 MarkupSafe==1.0
-Pygments==2.2.0
+Pygments==2.7.4
 pytz==2017.2
 requests==2.14.2
 six==1.10.0