diff --git a/requirements.txt b/requirements.txt
index e38e55b..ae8fd84 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ coverage==4.2
 flake8==3.0.4
 itypes==1.1.0
 jsonref==0.1
-markdown2==2.3.1
+markdown2==2.4.0
 mccabe==0.5.2
 py==1.4.31
 pycodestyle==2.0.0