diff --git a/docker/requirements.txt b/docker/requirements.txt
index 8bed77f..f735bb1 100644
--- a/docker/requirements.txt
+++ b/docker/requirements.txt
@@ -1,3 +1,3 @@
 setuptools==40.5.0
 flake8==3.6.0
-mistune==0.8.4
+mistune==2.0.3