diff --git a/LICENSE b/LICENSE
new file mode 100644
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,22 @@
+Copyright (c) 2016, Sannsyn AS
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
diff --git a/Setup.hs b/Setup.hs
new file mode 100644
--- /dev/null
+++ b/Setup.hs
@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain
diff --git a/aeson-json-ast.cabal b/aeson-json-ast.cabal
new file mode 100644
--- /dev/null
+++ b/aeson-json-ast.cabal
@@ -0,0 +1,46 @@
+name:
+  aeson-json-ast
+version:
+  0.1
+synopsis:
+  Integration layer for "json-ast" and "aeson"
+description:
+homepage:
+  https://github.com/sannsyn/aeson-json-ast 
+bug-reports:
+  https://github.com/sannsyn/aeson-json-ast/issues 
+author:
+  Nikita Volkov <nikita.y.volkov@mail.ru>
+maintainer:
+  Nikita Volkov <nikita.y.volkov@mail.ru>
+copyright:
+  (c) 2016, Sannsyn AS
+license:
+  MIT
+license-file:
+  LICENSE
+build-type:
+  Simple
+cabal-version:
+  >=1.10
+
+
+source-repository head
+  type:
+    git
+  location:
+    git://github.com/sannsyn/aeson-json-ast.git
+
+
+library
+  hs-source-dirs:
+    library
+  default-language:
+    Haskell2010
+  other-modules:
+  exposed-modules:
+    Data.Aeson.JSONAST
+  build-depends:
+    json-ast >= 0.2 && < 0.4,
+    aeson >= 0.8 && < 0.12,
+    base >= 4.6 && < 5
diff --git a/library/Data/Aeson/JSONAST.hs b/library/Data/Aeson/JSONAST.hs
new file mode 100644
--- /dev/null
+++ b/library/Data/Aeson/JSONAST.hs
@@ -0,0 +1,36 @@
+-- |
+-- This module exports 'FromJSON' and 'ToJSON' instance for 'JSONAST.JSON',
+-- as well as the conversion utilities.
+-- All of them bear zero runtime overhead compared to
+-- the native Aeson 'Value',
+-- because they are implemented using type coersion.
+module Data.Aeson.JSONAST where
+
+import Unsafe.Coerce
+import Data.Aeson
+import qualified JSONAST
+
+
+{-# INLINE jsonToValue #-}
+jsonToValue :: JSONAST.JSON -> Value
+jsonToValue =
+  unsafeCoerce
+
+{-# INLINE valueToJSON #-}
+valueToJSON :: Value -> JSONAST.JSON
+valueToJSON =
+  unsafeCoerce
+
+instance ToJSON JSONAST.JSON where
+  {-# INLINE toJSON #-}
+  toJSON =
+    jsonToValue
+  {-# INLINE toEncoding #-}
+  toEncoding =
+    toEncoding . jsonToValue
+
+instance FromJSON JSONAST.JSON where
+  {-# INLINE parseJSON #-}
+  parseJSON =
+    fmap valueToJSON .
+    parseJSON