diff --git a/requirements.txt b/requirements.txt
index 76c196c..70cff2d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -57,7 +57,7 @@ protobuf==3.2.0
 psutil==3.4.2
 ptyprocess==0.5.1
 pydot==1.0.29
-Pygments==2.1.3
+Pygments==2.7.4
 pyparsing==1.5.7
 python-dateutil==1.5
 python-engineio==1.0.3