diff --git a/requirements-dev.txt b/requirements-dev.txt
index af1c16f..52257d4 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -14,7 +14,7 @@ Sphinx~=4.3.2
 sphinx-rtd-theme~=1.0.0
 recommonmark~=0.7.1
 docutils==0.16
-mistune==0.8.4
+mistune==2.0.3
 m2r~=0.2.1
 
 # publishing