diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -43,24 +43,23 @@
     
     let h = encode' Base58 m :: ByteString
     -- You can check that a multihash corresponds to some data `v`
-    -- but you need to wrap the data in the newtype `Payload`
-    checkPayload h (Payload v)
+    checkMultihash h v
     -- Right True
-
+    
     -- Or if you have a Multihash to compare you can use it
     check h m
     -- Right True
 
     -- There is also an unsafe version, as for encode
     -- note that sometimes you will need to specify the string types
-    checkPayload' ("whatever"::String) (Payload v)
+    checkMultihash' ("whatever"::String) v
     -- *** Exception: Unable to infer an encoding
-    checkPayload' ("Eiwhatever"::ByteString) (Payload v)
+    checkMultihash' ("Eiwhatever"::ByteString) v
     -- *** Exception: base64: input: invalid length
     check' ("EiCfhtCBiEx9ZZov6qDFWtAVo79PGysLgizRXWwVsPA1CA=="::ByteString) m
     -- False
 
-    checkPayload' h (Payload v)
+    checkMultihash' h v
     -- True
     check' h m
     -- True
diff --git a/crypto-multihash.cabal b/crypto-multihash.cabal
--- a/crypto-multihash.cabal
+++ b/crypto-multihash.cabal
@@ -1,5 +1,5 @@
 name:                crypto-multihash
-version:             0.4.0.0
+version:             0.4.1.0
 synopsis:            Multihash library on top of cryptonite crypto library
 description:         Multihash is a protocol for encoding the hash algorithm
                      and digest length at the start of the digest, see the official
diff --git a/src/Crypto/Multihash.hs b/src/Crypto/Multihash.hs
--- a/src/Crypto/Multihash.hs
+++ b/src/Crypto/Multihash.hs
@@ -30,8 +30,8 @@
   , Base            (..)
   , Codable         (..)
   , Encodable       (..)
-  , Checkable       (..)
-  , Payload         (..)
+  --, Checkable       (..)
+  --, Payload         (..)
   -- * Multihash helpers
   , multihash
   , multihashlazy
diff --git a/src/Crypto/Multihash/Weak.hs b/src/Crypto/Multihash/Weak.hs
--- a/src/Crypto/Multihash/Weak.hs
+++ b/src/Crypto/Multihash/Weak.hs
@@ -34,8 +34,8 @@
     WeakMultihashDigest
   , Base            (..)
   , Encodable       (..)
-  , Checkable       (..)
-  , Payload         (..)
+  --, Checkable       (..)
+  --, Payload         (..)
     -- * Weak Multihash Helpers
   , weakMultihash
   , weakMultihash'