diff --git a/requirements.txt b/requirements.txt
index 81c18ae..d495725 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -57,7 +57,7 @@ protobuf==3.1.0
 psutil==4.3.0
 ptyprocess==0.5.1
 pyglet==1.2.4
-Pygments==2.2.0
+Pygments==2.7.4
 pykwalify==1.5.2
 PyOpenGL==3.1.0
 pyparsing==2.1.10