diff --git a/requirements-python37-rf31.txt b/requirements-python37-rf31.txt
index 308c3ed..df0356c 100644
--- a/requirements-python37-rf31.txt
+++ b/requirements-python37-rf31.txt
@@ -59,7 +59,7 @@ lazy-object-proxy==1.4.3
 lunr==0.5.8
 lxml==4.6.2
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==8.2.0
 nbconvert==5.6.1
 nbformat==4.4.0
diff --git a/requirements-python37-rf32.txt b/requirements-python37-rf32.txt
index a45b175..36184ce 100644
--- a/requirements-python37-rf32.txt
+++ b/requirements-python37-rf32.txt
@@ -59,7 +59,7 @@ lazy-object-proxy==1.4.3
 lunr==0.5.8
 lxml==4.6.2
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==8.2.0
 nbconvert==5.6.1
 nbformat==4.4.0