diff --git a/yesod-sitemap.cabal b/yesod-sitemap.cabal
--- a/yesod-sitemap.cabal
+++ b/yesod-sitemap.cabal
@@ -1,5 +1,5 @@
 name:            yesod-sitemap
-version:         1.2.0
+version:         1.4.0
 license:         MIT
 license-file:    LICENSE
 author:          Michael Snoyman <michael@snoyman.com>
@@ -14,7 +14,7 @@
 
 library
     build-depends:   base                      >= 4        && < 5
-                   , yesod-core                >= 1.2      && < 1.3
+                   , yesod-core                >= 1.4      && < 1.5
                    , time                      >= 1.1.4
                    , xml-conduit               >= 1.0
                    , text