diff --git a/requirements.txt b/requirements.txt
index 1c507c1..ef6cbdd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -33,7 +33,7 @@ pandocfilters==1.4.2
 parso==0.1.0
 pickleshare==0.7.4
 prompt-toolkit==1.0.15
-Pygments==2.2.0
+Pygments==2.7.4
 python-dateutil==2.6.1
 pytz==2017.3
 pyzmq==16.0.3