diff --git a/hack-middleware-gzip.cabal b/hack-middleware-gzip.cabal
--- a/hack-middleware-gzip.cabal
+++ b/hack-middleware-gzip.cabal
@@ -1,10 +1,10 @@
 name:            hack-middleware-gzip
-version:         0.0.0
+version:         0.0.0.1
 license:         BSD3
 license-file:    LICENSE
 author:          Michael Snoyman <michael@snoyman.com>
 maintainer:      Michael Snoyman <michael@snoyman.com>
-synopsis:        Automatic gzip compression of responses.
+synopsis:        Automatic gzip compression of responses. (deprecated)
 category:        Web
 stability:       unstable
 cabal-version:   >= 1.2
@@ -12,7 +12,7 @@
 homepage:        http://github.com/snoyberg/hack-middleware-gzip/tree/master
 
 library
-    build-depends:   base >= 3, split >= 0.1.1, zlib >= 0.5,
+    build-depends:   base >= 3 && < 5, split >= 0.1.1, zlib >= 0.5,
                      hack >= 2009.5.19
     exposed-modules: Hack.Middleware.Gzip
     ghc-options:     -Wall