diff --git a/yesod-eventsource.cabal b/yesod-eventsource.cabal
--- a/yesod-eventsource.cabal
+++ b/yesod-eventsource.cabal
@@ -1,5 +1,5 @@
 name:            yesod-eventsource
-version:         1.1.1.1
+version:         1.4.0
 license:         MIT
 license-file:    LICENSE
 author:          Felipe Lessa <felipe.lessa@gmail.com>
@@ -28,7 +28,7 @@
 
 library
     build-depends:   base                  >= 4        && < 5
-                   , yesod-core            == 1.2.*
+                   , yesod-core            == 1.4.*
                    , conduit               >= 0.5      && < 1.3
                    , wai                   >= 1.3
                    , wai-eventsource       >= 1.3