diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -53,7 +53,7 @@ pyramid==2.0.2
     plaster==1.1.2
   translationstring==1.4
   venusian==3.0.0
-  webob==1.8.8
+  webob==1.8.9
   zope.deprecation==5.0.0
   zope.interface==7.1.1
 python-memcached==1.62