diff --git a/tox.ini b/tox.ini
index 18ca4c1ff..d5adcb9d6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,7 +16,7 @@ deps =
     -r{toxinidir}/requirements.txt
     beautifulsoup4==4.4.1
     coverage==4.0.3
-    decorator==4.0.8
+    decorator==4.0.9
     Flask==0.10.1
     glob2==0.4.1
     httpbin==0.4.1