diff --git a/network-bitcoin.cabal b/network-bitcoin.cabal
--- a/network-bitcoin.cabal
+++ b/network-bitcoin.cabal
@@ -1,5 +1,5 @@
 Name:                network-bitcoin
-Version:             1.2.1
+Version:             1.2.2
 Synopsis:            An interface to bitcoind.
 Description:
     This can be used to send Bitcoins, query balances, etc.  It
@@ -49,8 +49,10 @@
     Network.Bitcoin.Wallet
   
   Build-depends:       
-    aeson >= 0.6.1,
-    bytestring >= 0.9,
+    aeson == 0.6.*,
+    bytestring >= 0.9 && < 0.11,
+    attoparsec == 0.10.*,
+    unordered-containers >= 0.2,
     HTTP >= 4000,
     network >= 2.3,
     text >= 0.11,