diff --git a/mandrill.cabal b/mandrill.cabal
--- a/mandrill.cabal
+++ b/mandrill.cabal
@@ -1,5 +1,5 @@
 name:                mandrill
-version:             0.5.3.2
+version:             0.5.3.3
 synopsis:            Library for interfacing with the Mandrill JSON API
 description:         Pure Haskell client for the Mandrill JSON API
 license:             MIT
@@ -41,7 +41,7 @@
     , http-types >= 0.8.0
     , http-client >= 0.3.0
     , http-client-tls >= 0.2.0.0
-    , aeson >= 0.7.0.3 && < 1.3.0.0
+    , aeson >= 0.7.0.3 && < 1.4.0.0
     , lens >= 4.0
     , blaze-html >= 0.5.0.0
     , QuickCheck >= 2.6 && < 3.0