diff --git a/requirements.txt b/requirements.txt
index 76d546c..2e21412 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -32,7 +32,7 @@ pickleshare==0.7.4
 plotly==2.0.10
 prompt-toolkit==1.0.14
 ptyprocess==0.5.1
-Pygments==2.2.0
+Pygments==2.7.4
 pyparsing==2.2.0
 python-dateutil==2.6.0
 pytz==2017.2