diff --git a/extdep/CMakeLists.txt b/extdep/CMakeLists.txt
index 5686a0c5d..4a3214d75 100644
--- a/extdep/CMakeLists.txt
+++ b/extdep/CMakeLists.txt
@@ -2,7 +2,6 @@ cmake_minimum_required(VERSION 2.8)
 
 include(ExternalProject)
 
-
 # all dependencies will be installed into this directory, separated by platform
 string(TOLOWER ${CMAKE_SYSTEM_NAME} _system_name)
 set(ETH_DEPENDENCY_INSTALL_DIR "${CMAKE_CURRENT_SOURCE_DIR}/install/${_system_name}")
@@ -14,6 +13,8 @@ include(jsoncpp.cmake)
 include(argtable2.cmake)
 include(json-rpc-cpp.cmake)
 include(cryptopp.cmake)
+include(snappy.cmake)
+include(leveldb.cmake)
 
 # will be re-eanbled later
 # include(curl.cmake)
diff --git a/extdep/leveldb.cmake b/extdep/leveldb.cmake
new file mode 100644
index 000000000..82d9f5a05
--- /dev/null
+++ b/extdep/leveldb.cmake
@@ -0,0 +1,22 @@
+if(APPLE)
+ExternalProject_Add(leveldb
+    DEPENDS snappy
+	URL https://leveldb.googlecode.com/files/leveldb-1.15.0.tar.gz 
+	BINARY_DIR leveldb-prefix/src/leveldb
+	CONFIGURE_COMMAND patch < ${CMAKE_CURRENT_SOURCE_DIR}/leveldb_osx.patch
+	BUILD_COMMAND export ETH_DEPENDENCY_INSTALL_DIR=${ETH_DEPENDENCY_INSTALL_DIR} && make -j 3
+	INSTALL_COMMAND cp -rf include/leveldb ${ETH_DEPENDENCY_INSTALL_DIR}/include/ && mv libleveldb.a ${ETH_DEPENDENCY_INSTALL_DIR}/lib && mv libleveldb.dylib.1.15 ${ETH_DEPENDENCY_INSTALL_DIR}/lib/libleveldb.dylib
+	)
+elseif(WIN32)
+ExternalProject_Add(leveldb
+	GIT_REPOSITORY https://code.google.com/p/leveldb
+	GIT_TAG windows
+	BINARY_DIR leveldb-prefix/src/leveldb
+	CONFIGURE_COMMAND ""
+	BUILD_COMMAND ""
+	INSTALL_COMMAND ""
+	)
+else()
+
+endif()
+
diff --git a/extdep/leveldb_osx.patch b/extdep/leveldb_osx.patch
new file mode 100644
index 000000000..ac9e8f528
--- /dev/null
+++ b/extdep/leveldb_osx.patch
@@ -0,0 +1,18 @@
+--- Makefile	2014-11-07 00:54:05.000000000 +0100
++++ MakefilePatch	2014-11-07 00:56:59.000000000 +0100
+@@ -17,11 +17,11 @@
+ # this file is generated by the previous line to set build flags and sources
+ include build_config.mk
+ 
+-CFLAGS += -I. -I./include $(PLATFORM_CCFLAGS) $(OPT)
+-CXXFLAGS += -I. -I./include $(PLATFORM_CXXFLAGS) $(OPT)
++CFLAGS += -I. -I./include $(PLATFORM_CCFLAGS) $(OPT) 
++CXXFLAGS += -I. -I./include $(PLATFORM_CXXFLAGS) $(OPT) -DSNAPPY -I$(ETH_DEPENDENCY_INSTALL_DIR)/include
+ 
+-LDFLAGS += $(PLATFORM_LDFLAGS)
+-LIBS += $(PLATFORM_LIBS)
++LDFLAGS += $(PLATFORM_LDFLAGS) -L$(ETH_DEPENDENCY_INSTALL_DIR)/lib
++LIBS += $(PLATFORM_LIBS) -lsnappy
+ 
+ LIBOBJECTS = $(SOURCES:.cc=.o)
+ MEMENVOBJECTS = $(MEMENV_SOURCES:.cc=.o)
diff --git a/extdep/snappy.cmake b/extdep/snappy.cmake
new file mode 100644
index 000000000..a15418304
--- /dev/null
+++ b/extdep/snappy.cmake
@@ -0,0 +1,14 @@
+if(APPLE)
+ExternalProject_Add(snappy
+	URL https://snappy.googlecode.com/files/snappy-1.1.1.tar.gz
+	BINARY_DIR snappy-prefix/src/snappy
+	CONFIGURE_COMMAND ./configure --disable-dependency-tracking --prefix=${ETH_DEPENDENCY_INSTALL_DIR} 
+	BUILD_COMMAND ""
+	INSTALL_COMMAND make install
+	)
+elseif(WIN32)
+
+else()
+
+endif()
+