diff --git a/sphinx/requirements.txt b/sphinx/requirements.txt
index abad429..c73cd24 100644
--- a/sphinx/requirements.txt
+++ b/sphinx/requirements.txt
@@ -10,7 +10,7 @@ Jinja2==2.10.1
 MarkupSafe==1.0
 markdown==2.6.11
 packaging==17.1
-Pygments==2.2.0
+Pygments==2.7.4
 pyparsing==2.2.0
 pytz==2018.5
 recommonmark==0.4.0