diff --git a/requirements.txt b/requirements.txt
index c401ee6..ab37de9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ pexpect==4.2.1
 pickleshare==0.7.4
 prompt-toolkit==1.0.9
 ptyprocess==0.5.1
-Pygments==2.1.3
+Pygments==2.7.4
 pytz==2017.2
 recommonmark==0.4.0
 requests==2.18.1