diff --git a/clientsession.cabal b/clientsession.cabal
--- a/clientsession.cabal
+++ b/clientsession.cabal
@@ -1,5 +1,5 @@
 name:            clientsession
-version:         0.8.1
+version:         0.9
 license:         BSD3
 license-file:    LICENSE
 author:          Michael Snoyman <michael@snoyman.com>, Felipe Lessa <felipe.lessa@gmail.com>
@@ -27,7 +27,7 @@
                    , directory           >= 1
                    , tagged              >= 0.1
                    , crypto-api          >= 0.8
-                   , skein               >= 0.1        && < 0.2
+                   , skein               == 1.0.*
                    , base64-bytestring   >= 0.1.1.1
                    , entropy             >= 0.2.1
                    , cprng-aes           >= 0.2