diff --git a/requirements.txt b/requirements.txt
index 8e8963a..cb3a56a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 Babel==2.2.0
 Jinja2==2.8
 MarkupSafe==0.23
-Pygments==2.1.1
+Pygments==2.7.4
 Sphinx==1.3.5
 alabaster==0.7.7
 argparse==1.2.1