diff --git a/requirements.txt b/requirements.txt
index d403a5a..b6ee430 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -39,7 +39,7 @@ pexpect==4.4.0
 pickleshare==0.7.4
 prompt-toolkit==1.0.15
 ptyprocess==0.5.2
-Pygments==2.2.0
+Pygments==2.7.4
 pyparsing==2.2.0
 pyproj==1.9.5.1
 python-dateutil==2.7.0