diff --git a/requirements.txt b/requirements.txt
index fad80ab..112b90f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ nose==1.3.7
 numpy==1.16.1
 OPi.GPIO==0.3.6
 pkginfo==1.5.0.1
-Pygments==2.3.1
+Pygments==2.7.4
 PyHamcrest==1.9.0
 pytz==2018.9
 readme-renderer==24.0