diff --git a/requirements.txt b/requirements.txt
index 4aad25b..121843d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -43,7 +43,7 @@ pickleshare==0.7.4
 plotly==3.0.2
 prompt-toolkit==1.0.15
 ptyprocess==0.6.0
-Pygments==2.2.0
+Pygments==2.7.4
 pyparsing==2.2.0
 python-dateutil==2.7.3
 pytz==2018.4