diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+0.9.3
+-----
+
+* Add upper bound < 1.6 for aeson dependency
+* Add Num Instance for IntDate
+
 0.9.2
 -----
 
diff --git a/Jose/Types.hs b/Jose/Types.hs
--- a/Jose/Types.hs
+++ b/Jose/Types.hs
@@ -1,4 +1,4 @@
-{-# LANGUAGE OverloadedStrings, DeriveGeneric, FlexibleContexts #-}
+{-# LANGUAGE OverloadedStrings, DeriveGeneric, FlexibleContexts, GeneralizedNewtypeDeriving #-}
 {-# OPTIONS_HADDOCK prune #-}
 
 module Jose.Types
@@ -104,7 +104,7 @@
   , jweKid :: Maybe KeyId
   } deriving (Eq, Show, Generic)
 
-newtype IntDate = IntDate POSIXTime deriving (Show, Eq, Ord)
+newtype IntDate = IntDate POSIXTime deriving (Show, Eq, Ord, Num)
 
 instance FromJSON IntDate where
     parseJSON = withScientific "IntDate" $ \n ->
diff --git a/jose-jwt.cabal b/jose-jwt.cabal
--- a/jose-jwt.cabal
+++ b/jose-jwt.cabal
@@ -1,5 +1,5 @@
 Name:               jose-jwt
-Version:            0.9.2
+Version:            0.9.3
 Synopsis:           JSON Object Signing and Encryption Library
 Homepage:           http://github.com/tekul/jose-jwt
 Bug-Reports:        http://github.com/tekul/jose-jwt/issues
@@ -50,7 +50,7 @@
     Buildable: False
   else
     Build-depends:    base >= 4.9 && < 5
-                    , aeson >= 0.8.0.2
+                    , aeson >= 1.5 && < 1.6
                     , attoparsec >= 0.12.0.0
                     , bytestring >= 0.9
                     , cereal >= 0.4