diff --git a/requirements.txt b/requirements.txt
index 70ff031..b799a30 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ Markdown==3.1
 MarkupSafe==1.1.1
 mkdocs==1.0.4
 mkdocs-material==4.1.1
-Pygments==2.3.1
+Pygments==2.7.4
 pymdown-extensions==6.0
 PyYAML==5.1
 six==1.12.0