diff --git a/src/Network/Wai/EventSource.hs b/src/Network/Wai/EventSource.hs
--- a/src/Network/Wai/EventSource.hs
+++ b/src/Network/Wai/EventSource.hs
@@ -16,7 +16,7 @@
 import           Data.Conduit
 import qualified Data.Conduit.List as CL
 import           Network.HTTP.Types (status200)
-import           Network.Wai (Application, Response(..))
+import           Network.Wai (Application, Response, responseSource)
 
 import Network.Wai.EventSource.EventStream
 
@@ -29,7 +29,7 @@
 
 -- | Make a new WAI EventSource application reading events from
 -- the given source.
-eventSourceAppSource :: Source (ResourceT IO) ServerEvent -> Application
+eventSourceAppSource :: Source IO ServerEvent -> Application
 eventSourceAppSource src _ = return $ response sourceToSource src
 
 -- | Make a new WAI EventSource application reading events from
@@ -37,13 +37,13 @@
 eventSourceAppIO :: IO ServerEvent -> Application
 eventSourceAppIO act _ = return $ response ioToSource act
 
-response :: (a -> Source (ResourceT IO) (Flush Builder)) -> a -> Response
-response f a = ResponseSource status200 [("Content-Type", "text/event-stream")] $ f a
+response :: (a -> Source IO (Flush Builder)) -> a -> Response
+response f a = responseSource status200 [("Content-Type", "text/event-stream")] $ f a
 
-chanToSource :: Chan ServerEvent -> Source (ResourceT IO) (Flush Builder)
+chanToSource :: Chan ServerEvent -> Source IO (Flush Builder)
 chanToSource = ioToSource . readChan
 
-ioToSource :: IO ServerEvent -> Source (ResourceT IO) (Flush Builder)
+ioToSource :: IO ServerEvent -> Source IO (Flush Builder)
 ioToSource act =
     loop
   where
diff --git a/wai-eventsource.cabal b/wai-eventsource.cabal
--- a/wai-eventsource.cabal
+++ b/wai-eventsource.cabal
@@ -1,5 +1,5 @@
 Name:                wai-eventsource
-Version:             1.3.0.4
+Version:             2.0.0
 Synopsis:            WAI support for server-sent events
 Description:         WAI support for server-sent events
 License:             MIT
@@ -19,8 +19,8 @@
     , blaze-builder             >= 0.3 && < 0.4
     , conduit                   >= 0.5      && < 1.1
     , http-types                >= 0.7
-    , wai                       >= 1.3      && < 1.5
-    , warp                      >= 1.3      && < 1.4
+    , wai                       >= 2.0      && < 2.1
+    , warp                      >= 2.0      && < 2.1
     , transformers
 
   ghc-options:     -Wall