diff --git a/doc/requirements.txt b/doc/requirements.txt
index b502f2d..588057d 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -12,7 +12,7 @@ livereload==2.4.1
 MarkupSafe==0.23
 pathtools==0.1.2
 port-for==0.3.1
-Pygments==2.1.3
+Pygments==2.7.4
 pytz==2016.1
 PyYAML==5.1
 recommonmark==0.4.0