diff --git a/requirements.txt b/requirements.txt
index 50db3dc..b59f7f8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -46,7 +46,7 @@ pickleshare==0.7.4
 prompt-toolkit==1.0.15
 protobuf==3.5.0.post1
 ptyprocess==0.5.2
-Pygments==2.2.0
+Pygments==2.7.4
 python-dateutil==2.6.1
 pyzmq==16.0.3
 qtconsole==4.3.1