diff --git a/docs/requirements.txt b/docs/requirements.txt
index 80fb822..a92ad6f 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -10,7 +10,7 @@ imagesize==0.7.1
 Jinja2==2.9.6
 jmespath==0.9.3
 MarkupSafe==1.0
-Pygments==2.2.0
+Pygments==2.7.4
 python-dateutil==2.6.1
 pytz==2017.3
 requests==2.18.4