diff --git a/docs/requirements.txt b/docs/requirements.txt
index 4b7638d..41e2d61 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -2,7 +2,7 @@
 GitPython==2.0.8
 Jinja2==2.10.1
 MarkupSafe==1.1.1
-Pygments==2.2.0
+Pygments==2.7.4
 alabaster==0.7.10
 babel==2.4.0
 gitdb==0.6.4