diff --git a/requirements.txt b/requirements.txt
index 8d05941..c012548 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 mkdocs==1
-pygments==2.2
+pygments==2.7.4
 pymdown-extensions==4.11
 mkdocs-material==3
 Markdown>=2.6.0