diff --git a/requirements.txt b/requirements.txt
index 9567383..8cd3893 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,7 @@ pickleshare==0.7.4
 plotly==2.0.13
 prompt-toolkit==1.0.15
 ptyprocess==0.5.2
-Pygments==2.2.0
+Pygments==2.7.4
 python-dateutil==2.6.1
 pytz==2017.2
 pyzmq==16.0.2