diff --git a/wai-predicates.cabal b/wai-predicates.cabal
--- a/wai-predicates.cabal
+++ b/wai-predicates.cabal
@@ -1,5 +1,5 @@
 name:                wai-predicates
-version:             0.2
+version:             0.2.1
 synopsis:            WAI request predicates
 license:             OtherLicense
 license-file:        LICENSE
@@ -55,7 +55,7 @@
       , http-types       == 0.8.*
       , transformers     == 0.3.*
       , vector           == 0.10.*
-      , wai              == 2.0.*
+      , wai              >= 2.0 && < 2.2
 
 test-suite wai-predicate-tests
     type:             exitcode-stdio-1.0