diff --git a/seqid.cabal b/seqid.cabal
--- a/seqid.cabal
+++ b/seqid.cabal
@@ -1,5 +1,5 @@
 name:                seqid
-version:             0.6.2
+version:             0.6.3
 synopsis:            Sequence ID production and consumption
 description:         Uniquely identify elements in a sequence.
 License:             BSD3
@@ -20,8 +20,8 @@
 library
   exposed-modules: Data.SequenceId
   build-depends: base         >= 4.7 && < 5
-               , mtl          >= 2.2 && < 2.3
-               , transformers >= 0.4 && < 0.6
+               , mtl          >= 2.2 && < 2.4
+               , transformers >= 0.4 && < 0.7
 
   hs-source-dirs:      src
   default-language:    Haskell2010