diff --git a/wai-routing.cabal b/wai-routing.cabal
--- a/wai-routing.cabal
+++ b/wai-routing.cabal
@@ -1,5 +1,5 @@
 name:                wai-routing
-version:             0.4
+version:             0.4.1
 synopsis:            Declarative routing for WAI.
 license:             OtherLicense
 license-file:        LICENSE
@@ -81,7 +81,7 @@
       , case-insensitive == 1.1.*
       , http-types       == 0.8.*
       , transformers     == 0.3.*
-      , wai              == 2.0.*
+      , wai              >= 2.0 && < 2.2
       , wai-predicates   == 0.2.*
       , wai-route        == 0.1.*
 
@@ -109,5 +109,5 @@
       , tasty-hunit      >= 0.2
       , tasty-quickcheck >= 0.3
       , wai
-      , wai-predicates   == 0.2.*
+      , wai-predicates
       , wai-routing