diff --git a/crypto-conduit.cabal b/crypto-conduit.cabal
--- a/crypto-conduit.cabal
+++ b/crypto-conduit.cabal
@@ -1,6 +1,6 @@
 Cabal-version:       >= 1.8
 Name:                crypto-conduit
-Version:             0.2.0
+Version:             0.3.0
 Synopsis:            Conduit interface for cryptographic operations (from crypto-api).
 Homepage:            https://github.com/meteficha/crypto-conduit
 License:             BSD3
@@ -35,8 +35,8 @@
     base         >= 3   && < 5,
     bytestring   >= 0.9 && < 0.10,
     cereal       >= 0.3 && < 0.4,
-    conduit      >= 0.3 && < 0.4,
-    transformers == 0.2.*
+    conduit      >= 0.4 && < 0.5,
+    transformers >= 0.2 && < 0.3
   if flag(old-crypto-api)
     Build-depends: crypto-api >= 0.8 && < 0.9
     CPP-options:   -DOLD_CRYPTO_API