diff --git a/requirements.txt b/requirements.txt
index 52615b71..4fe0b40c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ PyMySQL==0.9.2
 gunicorn==19.9.0
 normality==0.6.1  # Pin normality version for dataset
 dataset==1.1.0
-mistune==0.8.4
+mistune==2.0.3
 netaddr==0.7.19
 redis==3.0 # Adapt APScheduler
 datafreeze==0.1.0