diff --git a/requirements.txt b/requirements.txt
index 4305102..73911cd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -51,7 +51,7 @@ deprecated==1.2.18
     # via tsplib95
 docopt==0.6.2
     # via coveralls
-docutils==0.21.2
+docutils==0.22.4
     # via
     #   m2r2
     #   sphinx