diff --git a/requirements.txt b/requirements.txt
index ea8e8d0..2266b90 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ itsdangerous==1.1.0
 Jinja2==2.11.3
 jsonschema==3.2.0
 MarkupSafe==1.1.1
-mistune==0.8.4
+mistune==2.0.3
 PyMySQL==0.9.3
 pyrsistent==0.15.7
 python-dotenv==0.12.0