diff --git a/requirements.txt b/requirements.txt
index 593e791..3c26c20 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -66,7 +66,7 @@ prompt-toolkit==2.0.7
 prophet==0.1.1
 protobuf==3.6.1
 ptyprocess==0.6.0
-Pygments==2.3.1
+Pygments==2.7.4
 pyparsing==2.3.1
 pystan==2.17.1.0
 python-dateutil==2.7.5