diff --git a/requirements.txt b/requirements.txt
index 81c830e..968c9b3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,7 @@ py==1.7.0
 pycodestyle==2.4.0
 pydocstyle==3.0.0
 pyflakes==2.0.0
-Pygments==2.3.1
+Pygments==2.7.4
 pytest==4.1.1
 pyzmq==18.0.1
 readme-renderer==24.0