diff --git a/Yesod/WebSockets.hs b/Yesod/WebSockets.hs
--- a/Yesod/WebSockets.hs
+++ b/Yesod/WebSockets.hs
@@ -47,11 +47,7 @@
 webSockets inner = do
     req <- Y.waiRequest
     when (WaiWS.isWebSocketsReq req) $
-#if MIN_VERSION_wai(3, 0, 0)
         Y.sendRawResponseNoConduit
-#else
-        Y.sendRawResponse
-#endif
           $ \src sink -> control $ \runInIO -> WaiWS.runWebSockets
             WS.defaultConnectionOptions
             (WaiWS.getRequestHead req)
diff --git a/yesod-websockets.cabal b/yesod-websockets.cabal
--- a/yesod-websockets.cabal
+++ b/yesod-websockets.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                yesod-websockets
-version:             0.1.1.2
+version:             0.2.0
 synopsis:            WebSockets support for Yesod
 description:         WebSockets support for Yesod
 homepage:            https://github.com/yesodweb/yesod
@@ -24,7 +24,7 @@
                      , wai-websockets    >= 2.1
                      , websockets        >= 0.8
                      , transformers      >= 0.2
-                     , yesod-core        >= 1.2.7
+                     , yesod-core        >= 1.4
                      , monad-control     >= 0.3
                      , conduit           >= 1.0.15.1
                      , async             >= 2.0.1.5