diff --git a/fb.cabal b/fb.cabal
--- a/fb.cabal
+++ b/fb.cabal
@@ -1,5 +1,5 @@
 name:              fb
-version:           0.13.3
+version:           0.13.4
 license:           BSD3
 license-file:      LICENSE
 author:            Felipe Lessa
diff --git a/src/Facebook/Types.hs b/src/Facebook/Types.hs
--- a/src/Facebook/Types.hs
+++ b/src/Facebook/Types.hs
@@ -104,6 +104,9 @@
       where from i = TL.toStrict $ TLB.toLazyText $ TLBI.decimal (i :: Int64)
     parseJSON o = fail $ "Can't parse Facebook.Id from " ++ show o
 
+instance A.ToJSON Id where
+    toJSON (Id t) = A.String t
+
 
 -- | A Facebook user ID such as @1008905713901@.
 type UserId = Id