diff --git a/anagrams/requirements.txt b/anagrams/requirements.txt
index 7613846..568517a 100644
--- a/anagrams/requirements.txt
+++ b/anagrams/requirements.txt
@@ -14,7 +14,7 @@ jupyter-client==4.4.0
 jupyter-console==5.0.0
 jupyter-core==4.2.1
 MarkupSafe==0.23
-mistune==0.7.3
+mistune==2.0.3
 nbconvert==5.0.0
 nbformat==4.2.0
 notebook>=5.7.2