diff --git a/wai-frontend-monadcgi.cabal b/wai-frontend-monadcgi.cabal
--- a/wai-frontend-monadcgi.cabal
+++ b/wai-frontend-monadcgi.cabal
@@ -1,5 +1,5 @@
 name:            wai-frontend-monadcgi
-version:         2.0.0
+version:         2.0.0.1
 license:         MIT
 license-file:    LICENSE
 author:          Michael Snoyman <michael@snoyman.com>
@@ -20,7 +20,7 @@
                  , http-types
                  , transformers
                  , case-insensitive
-                 , wai               >= 2.0      && < 2.1
+                 , wai               >= 2.0      && < 2.2
     exposed-modules: Network.Wai.Frontend.MonadCGI
     ghc-options:     -Wall