diff --git a/docs/requirements.txt b/docs/requirements.txt
index 65ed3f0..f7b5b19 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -3,7 +3,7 @@ Babel==2.2.0
 docutils==0.12
 Jinja2==2.10.1
 MarkupSafe==0.23
-Pygments==2.1
+Pygments==2.7.4
 pytz==2015.7
 six==1.10.0
 snowballstemmer==1.2.1