diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -44,7 +44,7 @@ channelstream==0.7.1
       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
   pyramid-jinja2==2.10
@@ -59,7 +59,7 @@ channelstream==0.7.1
         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
     zope.deprecation==5.0.0
@@ -199,7 +199,7 @@ pyramid-mailer==0.15.1
       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
   repoze.sendmail==4.4.1
@@ -219,7 +219,7 @@ pyramid-mako==1.1.0
       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-ldap==3.4.3