diff --git a/Bindings/Groonga/Raw/Plugin.hsc b/Bindings/Groonga/Raw/Plugin.hsc
new file mode 100644
--- /dev/null
+++ b/Bindings/Groonga/Raw/Plugin.hsc
@@ -0,0 +1,30 @@
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+#include <bindings.dsl.h>
+#include <groonga/plugin.h>
+module Bindings.Groonga.Raw.Plugin where
+import Foreign.Ptr
+#strict_import
+
+import Bindings.Groonga.Raw
+#ccall grn_plugin_impl_init , Ptr <struct _grn_ctx> -> IO <grn_rc>
+#ccall grn_plugin_impl_register , Ptr <struct _grn_ctx> -> IO <grn_rc>
+#ccall grn_plugin_impl_fin , Ptr <struct _grn_ctx> -> IO <grn_rc>
+#ccall grn_plugin_malloc , Ptr <struct _grn_ctx> -> CSize -> CString -> CInt -> CString -> IO (Ptr ())
+#ccall grn_plugin_realloc , Ptr <struct _grn_ctx> -> Ptr () -> CSize -> CString -> CInt -> CString -> IO (Ptr ())
+#ccall grn_plugin_free , Ptr <struct _grn_ctx> -> Ptr () -> CString -> CInt -> CString -> IO ()
+#ccall grn_plugin_set_error , Ptr <struct _grn_ctx> -> <grn_log_level> -> <grn_rc> -> CString -> CInt -> CString -> CString -> IO ()
+#ccall grn_plugin_backtrace , Ptr <struct _grn_ctx> -> IO ()
+#ccall grn_plugin_logtrace , Ptr <struct _grn_ctx> -> <grn_log_level> -> IO ()
+{- typedef struct _grn_plugin_mutex grn_plugin_mutex; -}
+#opaque_t struct _grn_plugin_mutex
+#synonym_t grn_plugin_mutex , <struct _grn_plugin_mutex>
+#ccall grn_plugin_mutex_open , Ptr <struct _grn_ctx> -> IO (Ptr <struct _grn_plugin_mutex>)
+#ccall grn_plugin_mutex_create , Ptr <struct _grn_ctx> -> IO (Ptr <struct _grn_plugin_mutex>)
+#ccall grn_plugin_mutex_close , Ptr <struct _grn_ctx> -> Ptr <struct _grn_plugin_mutex> -> IO ()
+#ccall grn_plugin_mutex_destroy , Ptr <struct _grn_ctx> -> Ptr <struct _grn_plugin_mutex> -> IO ()
+#ccall grn_plugin_mutex_lock , Ptr <struct _grn_ctx> -> Ptr <struct _grn_plugin_mutex> -> IO ()
+#ccall grn_plugin_mutex_unlock , Ptr <struct _grn_ctx> -> Ptr <struct _grn_plugin_mutex> -> IO ()
+#ccall grn_plugin_proc_alloc , Ptr <struct _grn_ctx> -> Ptr <grn_user_data> -> CUInt -> CUShort -> IO (Ptr <struct _grn_obj>)
+#ccall grn_plugin_win32_base_dir , IO CString
+#ccall grn_plugin_charlen , Ptr <struct _grn_ctx> -> CString -> CUInt -> <grn_encoding> -> IO CInt
+#ccall grn_plugin_isspace , Ptr <struct _grn_ctx> -> CString -> CUInt -> <grn_encoding> -> IO CInt
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -17,3 +17,18 @@
 * Bindings.Groonga.Raw
 * Bindings.Groonga.SimpleAPI
 * Bindings.Groonga.Types
+
+## How to install
+
+Install Groonga.
+For example, if you use Ubuntu Linux, see: http://groonga.org/docs/install/ubuntu.html#lts-precise-pangolin
+
+And then,
+
+```bash
+$ cabal install haroonga
+```
+
+## Support Platform
+
+* Currently, Haroonga supports __Linux platform only__.
diff --git a/haroonga.cabal b/haroonga.cabal
--- a/haroonga.cabal
+++ b/haroonga.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                  haroonga
-version:               0.1.0.0
+version:               0.1.1.0
 synopsis:              Low level bindings for Groonga.
 description:           Bindings to Groonga  <http://groonga.org/>.
 license:               LGPL-2.1
@@ -18,6 +18,7 @@
 library
   exposed-modules:     Bindings.Groonga
                        Bindings.Groonga.Raw
+                       Bindings.Groonga.Raw.Plugin
                        Bindings.Groonga.CommandAPI
                        Bindings.Groonga.Types
   build-depends:       base          >= 4.5 && < 5
@@ -28,7 +29,7 @@
   hs-source-dirs:      .
   build-tools:         hsc2hs
   default-language:    Haskell2010
-  pkgconfig-depends:   groonga >= 4.0.0
+  pkgconfig-depends:   groonga >= 4.0.1
 
 source-repository head
   type: git