diff --git a/Requirements.txt b/Requirements.txt
index d3d0311..816efcc 100644
--- a/Requirements.txt
+++ b/Requirements.txt
@@ -5,7 +5,7 @@ Flask-Principal
 flask-caching
 Flask-FileUpload
 SQLAlchemy>=1.3.1
-Markdown
+Markdown==3.3.7
 Werkzeug>=1.0.0
 blinker
 python-slugify