diff --git a/Data/RefSerialize.hs b/Data/RefSerialize.hs
--- a/Data/RefSerialize.hs
+++ b/Data/RefSerialize.hs
@@ -3,6 +3,7 @@
             -XFlexibleInstances
             -XUndecidableInstances
             -XOverloadedStrings
+            -XIncoherentInstances
               #-}
 
 -----------------------------------------------------------------------------
@@ -415,11 +416,7 @@
 
 -- -------------Instances
 
-instance Serialize String where
-    showp = showpText
-    readp = readpText
 
-
 instance  Serialize a => Serialize [a] where
    showp []= insertString "[]"
    showp (x:xs)= do
@@ -481,7 +478,11 @@
 -}
 
 
+instance Serialize String where
+    showp = showpText
+    readp = readpText
 
+
 instance (Serialize a, Serialize b) => Serialize (a, b) where
     showp (x, y)= do
             insertString  "("
@@ -610,11 +611,11 @@
   take1 s n=  anyChar >>= \x -> take1 (snoc s x ) (n-1)
 
 
--- | defualt instances
+-- | default instances
 
-instance (Show a, Read a )=> Serialize a where
-  showp= showpText
-  readp= readpText
+--instance (Show a, Read a )=> Serialize a where
+--  showp= showpText
+--  readp= readpText
 
 
 
diff --git a/RefSerialize.cabal b/RefSerialize.cabal
--- a/RefSerialize.cabal
+++ b/RefSerialize.cabal
@@ -1,5 +1,5 @@
 name:                RefSerialize
-version:             0.3.0.1
+version:             0.3.1.0
 synopsis:            Write to and read from ByteStrings maintaining internal memory references
 description:
                      Read, Show and Binary instances do not check for internal data references to the same address.
@@ -8,6 +8,8 @@
                      it allocates multiple copies for the same object when referenced multiple times. Because multiple referenced
                      data is very typical in a pure language such is Haskell, this means that the resulting data loose the beatiful
                      economy of space and processing time that referential transparency permits.
+                     .
+                     In this release the default "(Read a, Show a) => Refserialize a" has been removed.
                      .
                      See "Data.RefSerialize" for details