diff --git a/mandrill.cabal b/mandrill.cabal
--- a/mandrill.cabal
+++ b/mandrill.cabal
@@ -1,5 +1,5 @@
 name:                mandrill
-version:             0.5.7.0
+version:             0.5.8.0
 synopsis:            Library for interfacing with the Mandrill JSON API
 description:         Pure Haskell client for the Mandrill JSON API
 license:             MIT
@@ -37,7 +37,7 @@
     , containers >= 0.5.0.0
     , bytestring >= 0.9.0
     , base64-bytestring >= 1.0.0.1
-    , text >= 1.0.0.0 && < 2.1
+    , text >= 1.0.0.0 && < 2.2
     , http-types >= 0.8.0
     , http-client >= 0.3.0
     , http-client-tls >= 0.2.0.0