diff --git a/requirements.txt b/requirements.txt
index 5484428..6fc295a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ mkdocs-bootstrap==0.1.1
 mkdocs-bootswatch==0.4.0
 mkdocs-material==1.8.0
 packaging==16.8
-Pygments==2.2.0
+Pygments==2.7.4
 pymdown-extensions==3.5
 pyparsing==2.1.10
 PyYAML==3.12