diff --git a/misc/requirements/requirements-optional.txt b/misc/requirements/requirements-optional.txt
index aafa38e46..e0b5f0609 100644
--- a/misc/requirements/requirements-optional.txt
+++ b/misc/requirements/requirements-optional.txt
@@ -2,6 +2,6 @@
 
 colorama==0.4.1
 cssutils==1.0.2
-hunter==2.1.0
+hunter==2.2.1
 Pympler==0.6
 six==1.12.0