diff --git a/riak.cabal b/riak.cabal
--- a/riak.cabal
+++ b/riak.cabal
@@ -1,5 +1,5 @@
 name:                riak
-version:             1.1.2.3
+version:             1.1.2.4
 synopsis:            A Haskell client for the Riak decentralized data store
 description:
   A Haskell client library for the Riak decentralized data
@@ -102,7 +102,7 @@
 
   build-depends:
                 aeson                         >= 0.8      && < 1.3,
-                async                         >= 2.0.0.0  && < 2.2,
+                async                         >= 2.0.0.0  && < 2.3,
                 attoparsec                    >= 0.12.1.6 && < 0.14,
                 base                          >= 3        && < 5,
                 bifunctors                    >= 4.2      && < 6,