diff --git a/requirements.txt b/requirements.txt
index 7125e32f..7c021a22 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ mkdocs>=1.1.2
 # Add your custom theme if not inside a theme_dir
 # (https://github.com/mkdocs/mkdocs/wiki/MkDocs-Themes)
 mkdocs-material>=5.4.0
-Pygments
+Pygments>=2.4
 git+https://github.com/pugong/mkdocs-mermaid-plugin
 mkdocs-git-authors-plugin
 mkdocs-git-revision-date-plugin