diff --git a/google-oauth2-jwt.cabal b/google-oauth2-jwt.cabal
--- a/google-oauth2-jwt.cabal
+++ b/google-oauth2-jwt.cabal
@@ -1,5 +1,5 @@
 name:                google-oauth2-jwt
-version:             0.2.2
+version:             0.3.0
 synopsis:            Get a signed JWT for Google Service Accounts
 description:         This library implements the creation of the
                      signed JWT for Google Service Accounts.
@@ -8,7 +8,7 @@
 license-file:        LICENSE
 author:              Michel Boucey
 maintainer:          michel.boucey@cybervisible.fr
-copyright:           (c) 2016-2017 - Michel Boucey
+copyright:           (c) 2016-2018 - Michel Boucey
 category:            Google
 build-type:          Simple
 extra-source-files:  README.md
diff --git a/src/Network/Google/OAuth2/JWT.hs b/src/Network/Google/OAuth2/JWT.hs
--- a/src/Network/Google/OAuth2/JWT.hs
+++ b/src/Network/Google/OAuth2/JWT.hs
@@ -24,6 +24,7 @@
 import qualified Data.ByteString            as B
 import           Data.ByteString.Base64.URL (encode)
 import           Data.ByteString.Lazy       (fromStrict, toStrict)
+import           Data.ByteString.Char8      (unpack)
 import           Data.Maybe                 (fromMaybe, fromJust)
 import           Data.Monoid                ((<>))
 import qualified Data.Text                  as T
@@ -37,7 +38,10 @@
 
 data SignedJWT =
   SignedJWT !B.ByteString
-  deriving (Eq, Show)
+  deriving (Eq)
+
+instance Show SignedJWT where
+  show (SignedJWT t) = unpack t
 
 type Email = T.Text