diff --git a/Test/Gen.hs b/Test/Gen.hs
index b25c84d..1917760 100644
--- a/Test/Gen.hs
+++ b/Test/Gen.hs
@@ -47,6 +47,8 @@ genWaiRequest = do
                 bodylen         -- requestBodyLength
                 (Just host)     -- requestHeaderHost
                 Nothing         -- requestHeaderRange
+                Nothing         -- requestHeaderReferer
+                Nothing         -- requestHeaderUserAgent
 
 
 genRequestBody :: Gen (Wai.RequestBodyLength, ByteString)
diff --git a/http-proxy.cabal b/http-proxy.cabal
index 185548d..052f9a3 100644
--- a/http-proxy.cabal
+++ b/http-proxy.cabal
@@ -43,7 +43,7 @@ Library
                    , tls                     >= 1.2
                    , text                    >= 1.2
                    , transformers            >= 0.3
-                   , wai                     >= 3.0
+                   , wai                     >= 3.2
                    , wai-conduit             >= 3.0
                    , warp                    >= 3.0
                    , warp-tls                >= 3.0