diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index bd866e0..04e17d7
--- a/requirements.txt
+++ b/requirements.txt
@@ -73,7 +73,7 @@ ptyprocess==0.5.2
 py==1.5.3
 pycparser==2.18
 pyglet==1.3.2
-Pygments==2.2.0
+Pygments==2.7.4
 PyOpenGL==3.1.0
 pyparsing==2.2.0
 pytest==3.6.1