diff --git a/requirements.txt b/requirements.txt
index 2cadd0e..27913de 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -54,7 +54,7 @@ protobuf==3.4.0
 ptyprocess==0.5.2
 pycurl==7.43.0
 pyglet==1.3.0
-Pygments==2.2.0
+Pygments==2.7.4
 pygobject==3.20.0
 pymc3==3.2
 pyparsing==2.2.0