diff --git a/requirements-ci.txt b/requirements-ci.txt
index bd528876..ad860f77 100644
--- a/requirements-ci.txt
+++ b/requirements-ci.txt
@@ -48,7 +48,7 @@ MarkupSafe==2.0.1
 matplotlib==3.4.2
 matplotlib-inline==0.1.2
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 mpmath==1.2.1
 msgpack==0.6.2
 nbclient==0.5.3