diff --git a/requirements.txt b/requirements.txt
index d213703..e684605 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -88,7 +88,7 @@ pycodestyle==2.4.0
 pycparser==2.18
 pydot==1.4.1
 pyflakes==2.0.0
-Pygments==2.2.0
+Pygments==2.7.4
 pygpu==0.7.6
 pylint==2.1.1
 pyOpenSSL==18.0.0