diff --git a/pyDiscreeTest/requirements.txt b/pyDiscreeTest/requirements.txt
index 64d6688..5540ed4 100644
--- a/pyDiscreeTest/requirements.txt
+++ b/pyDiscreeTest/requirements.txt
@@ -16,7 +16,7 @@ Jinja2==2.10
 jsonschema==2.6.0
 kiwisolver==1.0.1
 MarkupSafe==1.0
-mistune==0.8.3
+mistune==2.0.3
 numpy==1.14.5
 parso==0.3.1
 patsy==0.5.0