diff --git a/requirements.txt b/requirements.txt
index d64bc70..5db2023 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -254,7 +254,7 @@ pydotplus==2.0.2
 PyDrive==1.3.1
 pyemd==0.5.1
 pyglet==1.5.0
-Pygments==2.1.3
+Pygments==2.7.4
 pygobject==3.26.1
 pymc3==3.7
 PyMeeus==0.3.7