diff --git a/Crypto/Hash/MD2.hs b/Crypto/Hash/MD2.hs
--- a/Crypto/Hash/MD2.hs
+++ b/Crypto/Hash/MD2.hs
@@ -60,9 +60,17 @@
 #endif
 
 newtype Ctx = Ctx ByteString
+
+{-# DEPRECATED MD2
+        ["Future cryptohash versions will not export crypto-api hash instances here."
+        ,"you can either :"
+        ,"  - carry using cryptoapi types and definitions by using the"
+        ,"    cryptohash-cryptoapi package and importing Crypto.Hash.CryptoAPI"
+        ,"    instead of Crypto.Hash.MD2."
+        ,"  - use cryptohash's centralized API by importing Crypto.Hash"
+        ] #-}
 data MD2 = Digest !ByteString
     deriving (Eq,Ord,Show)
-
 
 {-# INLINE digestSize #-}
 digestSize :: Int
diff --git a/Crypto/Hash/MD4.hs b/Crypto/Hash/MD4.hs
--- a/Crypto/Hash/MD4.hs
+++ b/Crypto/Hash/MD4.hs
@@ -60,9 +60,17 @@
 #endif
 
 newtype Ctx = Ctx ByteString
+
+{-# DEPRECATED MD4
+        ["Future cryptohash versions will not export crypto-api hash instances here."
+        ,"you can either :"
+        ,"  - carry using cryptoapi types and definitions by using the"
+        ,"    cryptohash-cryptoapi package and importing Crypto.Hash.CryptoAPI"
+        ,"    instead of Crypto.Hash.MD4."
+        ,"  - use cryptohash's centralized API by importing Crypto.Hash"
+        ] #-}
 data MD4 = Digest !ByteString
     deriving (Eq,Ord,Show)
-
 
 {-# INLINE digestSize #-}
 digestSize :: Int
diff --git a/Crypto/Hash/MD5.hs b/Crypto/Hash/MD5.hs
--- a/Crypto/Hash/MD5.hs
+++ b/Crypto/Hash/MD5.hs
@@ -60,9 +60,17 @@
 #endif
 
 newtype Ctx = Ctx ByteString
+
+{-# DEPRECATED MD5
+        ["Future cryptohash versions will not export crypto-api hash instances here."
+        ,"you can either :"
+        ,"  - carry using cryptoapi types and definitions by using the"
+        ,"    cryptohash-cryptoapi package and importing Crypto.Hash.CryptoAPI"
+        ,"    instead of Crypto.Hash.MD5."
+        ,"  - use cryptohash's centralized API by importing Crypto.Hash"
+        ] #-}
 data MD5 = Digest !ByteString
     deriving (Eq,Ord,Show)
-
 
 {-# INLINE digestSize #-}
 digestSize :: Int
diff --git a/Crypto/Hash/RIPEMD160.hs b/Crypto/Hash/RIPEMD160.hs
--- a/Crypto/Hash/RIPEMD160.hs
+++ b/Crypto/Hash/RIPEMD160.hs
@@ -60,9 +60,17 @@
 #endif
 
 newtype Ctx = Ctx ByteString
+
+{-# DEPRECATED RIPEMD160
+        ["Future cryptohash versions will not export crypto-api hash instances here."
+        ,"you can either :"
+        ,"  - carry using cryptoapi types and definitions by using the"
+        ,"    cryptohash-cryptoapi package and importing Crypto.Hash.CryptoAPI"
+        ,"    instead of Crypto.Hash.RIPEMD160."
+        ,"  - use cryptohash's centralized API by importing Crypto.Hash"
+        ] #-}
 data RIPEMD160 = Digest !ByteString
     deriving (Eq,Ord,Show)
-
 
 {-# INLINE digestSize #-}
 digestSize :: Int
diff --git a/Crypto/Hash/SHA1.hs b/Crypto/Hash/SHA1.hs
--- a/Crypto/Hash/SHA1.hs
+++ b/Crypto/Hash/SHA1.hs
@@ -60,9 +60,17 @@
 #endif
 
 newtype Ctx = Ctx ByteString
+
+{-# DEPRECATED SHA1
+        ["Future cryptohash versions will not export crypto-api hash instances here."
+        ,"you can either :"
+        ,"  - carry using cryptoapi types and definitions by using the"
+        ,"    cryptohash-cryptoapi package and importing Crypto.Hash.CryptoAPI"
+        ,"    instead of Crypto.Hash.SHA1."
+        ,"  - use cryptohash's centralized API by importing Crypto.Hash"
+        ] #-}
 data SHA1 = Digest !ByteString
     deriving (Eq,Ord,Show)
-
 
 {-# INLINE digestSize #-}
 digestSize :: Int
diff --git a/Crypto/Hash/SHA224.hs b/Crypto/Hash/SHA224.hs
--- a/Crypto/Hash/SHA224.hs
+++ b/Crypto/Hash/SHA224.hs
@@ -60,9 +60,17 @@
 #endif
 
 newtype Ctx = Ctx ByteString
+
+{-# DEPRECATED SHA224
+        ["Future cryptohash versions will not export crypto-api hash instances here."
+        ,"you can either :"
+        ,"  - carry using cryptoapi types and definitions by using the"
+        ,"    cryptohash-cryptoapi package and importing Crypto.Hash.CryptoAPI"
+        ,"    instead of Crypto.Hash.SHA224."
+        ,"  - use cryptohash's centralized API by importing Crypto.Hash"
+        ] #-}
 data SHA224 = Digest !ByteString
     deriving (Eq,Ord,Show)
-
 
 {-# INLINE digestSize #-}
 digestSize :: Int
diff --git a/Crypto/Hash/SHA256.hs b/Crypto/Hash/SHA256.hs
--- a/Crypto/Hash/SHA256.hs
+++ b/Crypto/Hash/SHA256.hs
@@ -60,9 +60,17 @@
 #endif
 
 newtype Ctx = Ctx ByteString
+
+{-# DEPRECATED SHA256
+        ["Future cryptohash versions will not export crypto-api hash instances here."
+        ,"you can either :"
+        ,"  - carry using cryptoapi types and definitions by using the"
+        ,"    cryptohash-cryptoapi package and importing Crypto.Hash.CryptoAPI"
+        ,"    instead of Crypto.Hash.SHA256."
+        ,"  - use cryptohash's centralized API by importing Crypto.Hash"
+        ] #-}
 data SHA256 = Digest !ByteString
     deriving (Eq,Ord,Show)
-
 
 {-# INLINE digestSize #-}
 digestSize :: Int
diff --git a/Crypto/Hash/SHA3.hs b/Crypto/Hash/SHA3.hs
--- a/Crypto/Hash/SHA3.hs
+++ b/Crypto/Hash/SHA3.hs
@@ -59,9 +59,17 @@
 #endif
 
 newtype Ctx = Ctx ByteString
+
+{-# DEPRECATED SHA3
+        ["Future cryptohash versions will not export crypto-api hash instances here."
+        ,"you can either :"
+        ,"  - carry using cryptoapi types and definitions by using the"
+        ,"    cryptohash-cryptoapi package and importing Crypto.Hash.CryptoAPI"
+        ,"    instead of Crypto.Hash.SHA3."
+        ,"  - use cryptohash's centralized API by importing Crypto.Hash"
+        ] #-}
 data SHA3 = Digest !ByteString
     deriving (Eq,Ord,Show)
-
 
 {-# INLINE sizeCtx #-}
 sizeCtx :: Int
diff --git a/Crypto/Hash/SHA384.hs b/Crypto/Hash/SHA384.hs
--- a/Crypto/Hash/SHA384.hs
+++ b/Crypto/Hash/SHA384.hs
@@ -60,9 +60,17 @@
 #endif
 
 newtype Ctx = Ctx ByteString
+
+{-# DEPRECATED SHA384
+        ["Future cryptohash versions will not export crypto-api hash instances here."
+        ,"you can either :"
+        ,"  - carry using cryptoapi types and definitions by using the"
+        ,"    cryptohash-cryptoapi package and importing Crypto.Hash.CryptoAPI"
+        ,"    instead of Crypto.Hash.SHA384."
+        ,"  - use cryptohash's centralized API by importing Crypto.Hash"
+        ] #-}
 data SHA384 = Digest !ByteString
     deriving (Eq,Ord,Show)
-
 
 {-# INLINE digestSize #-}
 digestSize :: Int
diff --git a/Crypto/Hash/SHA512.hs b/Crypto/Hash/SHA512.hs
--- a/Crypto/Hash/SHA512.hs
+++ b/Crypto/Hash/SHA512.hs
@@ -61,9 +61,17 @@
 #endif
 
 newtype Ctx = Ctx ByteString
+
+{-# DEPRECATED SHA512
+        ["Future cryptohash versions will not export crypto-api hash instances here."
+        ,"you can either :"
+        ,"  - carry using cryptoapi types and definitions by using the"
+        ,"    cryptohash-cryptoapi package and importing Crypto.Hash.CryptoAPI"
+        ,"    instead of Crypto.Hash.SHA512."
+        ,"  - use cryptohash's centralized API by importing Crypto.Hash"
+        ] #-}
 data SHA512 = Digest !ByteString
     deriving (Eq,Ord,Show)
-
 
 {-# INLINE digestSize #-}
 digestSize :: Int
diff --git a/Crypto/Hash/Skein256.hs b/Crypto/Hash/Skein256.hs
--- a/Crypto/Hash/Skein256.hs
+++ b/Crypto/Hash/Skein256.hs
@@ -59,9 +59,17 @@
 #endif
 
 newtype Ctx = Ctx ByteString
+
+{-# DEPRECATED Skein256
+        ["Future cryptohash versions will not export crypto-api hash instances here."
+        ,"you can either :"
+        ,"  - carry using cryptoapi types and definitions by using the"
+        ,"    cryptohash-cryptoapi package and importing Crypto.Hash.CryptoAPI"
+        ,"    instead of Crypto.Hash.Skein256."
+        ,"  - use cryptohash's centralized API by importing Crypto.Hash"
+        ] #-}
 data Skein256 = Digest !ByteString
     deriving (Eq,Ord,Show)
-
 
 {-# INLINE sizeCtx #-}
 sizeCtx :: Int
diff --git a/Crypto/Hash/Skein512.hs b/Crypto/Hash/Skein512.hs
--- a/Crypto/Hash/Skein512.hs
+++ b/Crypto/Hash/Skein512.hs
@@ -59,9 +59,17 @@
 #endif
 
 newtype Ctx = Ctx ByteString
+
+{-# DEPRECATED Skein512
+        ["Future cryptohash versions will not export crypto-api hash instances here."
+        ,"you can either :"
+        ,"  - carry using cryptoapi types and definitions by using the"
+        ,"    cryptohash-cryptoapi package and importing Crypto.Hash.CryptoAPI"
+        ,"    instead of Crypto.Hash.Skein512."
+        ,"  - use cryptohash's centralized API by importing Crypto.Hash"
+        ] #-}
 data Skein512 = Digest !ByteString
     deriving (Eq,Ord,Show)
-
 
 {-# INLINE sizeCtx #-}
 sizeCtx :: Int
diff --git a/Crypto/Hash/Tiger.hs b/Crypto/Hash/Tiger.hs
--- a/Crypto/Hash/Tiger.hs
+++ b/Crypto/Hash/Tiger.hs
@@ -60,9 +60,17 @@
 #endif
 
 newtype Ctx = Ctx ByteString
+
+{-# DEPRECATED Tiger
+        ["Future cryptohash versions will not export crypto-api hash instances here."
+        ,"you can either :"
+        ,"  - carry using cryptoapi types and definitions by using the"
+        ,"    cryptohash-cryptoapi package and importing Crypto.Hash.CryptoAPI"
+        ,"    instead of Crypto.Hash.Tiger."
+        ,"  - use cryptohash's centralized API by importing Crypto.Hash"
+        ] #-}
 data Tiger = Digest !ByteString
     deriving (Eq,Ord,Show)
-
 
 {-# INLINE digestSize #-}
 digestSize :: Int
diff --git a/Crypto/Hash/Whirlpool.hs b/Crypto/Hash/Whirlpool.hs
--- a/Crypto/Hash/Whirlpool.hs
+++ b/Crypto/Hash/Whirlpool.hs
@@ -60,9 +60,17 @@
 #endif
 
 newtype Ctx = Ctx ByteString
+
+{-# DEPRECATED Whirlpool
+        ["Future cryptohash versions will not export crypto-api hash instances here."
+        ,"you can either :"
+        ,"  - carry using cryptoapi types and definitions by using the"
+        ,"    cryptohash-cryptoapi package and importing Crypto.Hash.CryptoAPI"
+        ,"    instead of Crypto.Hash.Whirlpool."
+        ,"  - use cryptohash's centralized API by importing Crypto.Hash"
+        ] #-}
 data Whirlpool = Digest !ByteString
     deriving (Eq,Ord,Show)
-
 
 {-# INLINE digestSize #-}
 digestSize :: Int
diff --git a/cryptohash.cabal b/cryptohash.cabal
--- a/cryptohash.cabal
+++ b/cryptohash.cabal
@@ -1,5 +1,5 @@
 Name:                cryptohash
-Version:             0.8.4
+Version:             0.9.0
 Description:
     A collection of crypto hashes, with a practical incremental and one-pass, pure APIs,
     with performance close to the fastest implementations available in others languages.