diff --git a/docs_requirements.txt b/docs_requirements.txt
index 31050f7..bf9ce87 100644
--- a/docs_requirements.txt
+++ b/docs_requirements.txt
@@ -4,7 +4,7 @@ docutils==0.14
 imagesize==0.7.1
 Jinja2==2.9.6
 MarkupSafe==1.0
-Pygments==2.2.0
+Pygments==2.7.4
 pytz==2017.2
 six==1.11.0
 snowballstemmer==1.2.1