diff --git a/aop-prelude.cabal b/aop-prelude.cabal
--- a/aop-prelude.cabal
+++ b/aop-prelude.cabal
@@ -4,7 +4,7 @@
 -- http://haskell.org/cabal/users-guide/
 
 name:                aop-prelude
-version:             0.3.0.0
+version:             0.3.0.1
 synopsis:            prelude for Algebra of Programming
 description:         prelude for Algenra of Programming, the original code was created by Richard Bird.
 homepage:            https://github.com/cutsea110/aop-prelude.git
diff --git a/src/AOPPrelude.hs b/src/AOPPrelude.hs
--- a/src/AOPPrelude.hs
+++ b/src/AOPPrelude.hs
@@ -51,6 +51,13 @@
   , negate, primPrint, strict, error
   , show
   , flip
+    -- Re-exports
+  , String
+  , Num
+  , Fractional
+  , Show
+  , Natural
+  , module GHC.Types
   ) where
 ---------------------------------------------------------------------
 -- Prelude for `Algebra of Programming' -----------------------------