diff --git a/cmake/EthDependencies.cmake b/cmake/EthDependencies.cmake
index 37ab76d0e..0c5580bd4 100644
--- a/cmake/EthDependencies.cmake
+++ b/cmake/EthDependencies.cmake
@@ -93,7 +93,7 @@ elseif (UNIX)
 
 endif()
 
-find_package(Boost 1.54.0 REQUIRED COMPONENTS random)
+find_package(Boost 1.54.0 REQUIRED COMPONENTS system)
 
 message(" - boost header: ${Boost_INCLUDE_DIRS}")
 message(" - boost lib   : ${Boost_LIBRARIES}")
diff --git a/libdevcore/FixedHash.cpp b/libdevcore/FixedHash.cpp
index 420e2bb16..167f99a1a 100644
--- a/libdevcore/FixedHash.cpp
+++ b/libdevcore/FixedHash.cpp
@@ -20,31 +20,9 @@
  */
 
 #include "FixedHash.h"
-#include <ctime>
 #include <boost/algorithm/string.hpp>
 
 using namespace std;
 using namespace dev;
 
-boost::random_device dev::s_fixedHashEngine;
-
-h128 dev::fromUUID(std::string const& _uuid)
-{
-	try
-	{
-		return h128(boost::replace_all_copy(_uuid, "-", ""));
-	}
-	catch (...)
-	{
-		return h128();
-	}
-}
-
-std::string dev::toUUID(h128 const& _uuid)
-{
-	std::string ret = toHex(_uuid.ref());
-	for (unsigned i: {20, 16, 12, 8})
-		ret.insert(ret.begin() + i, '-');
-	return ret;
-}
-
+std::random_device dev::s_fixedHashEngine;
\ No newline at end of file
diff --git a/libdevcore/FixedHash.h b/libdevcore/FixedHash.h
index 8beb3bec7..c09d54759 100644
--- a/libdevcore/FixedHash.h
+++ b/libdevcore/FixedHash.h
@@ -26,8 +26,7 @@
 #include <array>
 #include <cstdint>
 #include <algorithm>
-#include <boost/random/random_device.hpp>
-#include <boost/random/uniform_int_distribution.hpp>
+#include <random>
 #include "CommonData.h"
 
 namespace dev
@@ -37,7 +36,7 @@ namespace dev
 template <unsigned N> struct StaticLog2 { enum { result = 1 + StaticLog2<N/2>::result }; };
 template <> struct StaticLog2<1> { enum { result = 0 }; };
 
-extern boost::random_device s_fixedHashEngine;
+extern std::random_device s_fixedHashEngine;
 
 /// Fixed-size raw-byte array container type, with an API optimised for storing hashes.
 /// Transparently converts to/from the corresponding arithmetic type; this will
@@ -154,7 +153,7 @@ public:
 	void randomize(Engine& _eng)
 	{
 		for (auto& i: m_data)
-			i = (uint8_t)boost::random::uniform_int_distribution<uint16_t>(0, 255)(_eng);
+			i = (uint8_t)std::uniform_int_distribution<uint16_t>(0, 255)(_eng);
 	}
 
 	/// @returns a random valued object.
@@ -291,7 +290,6 @@ public:
 	bytesConstRef ref() const { return FixedHash<T>::ref(); }
 	byte const* data() const { return FixedHash<T>::data(); }
 
-	static SecureFixedHash<T> random() { SecureFixedHash<T> ret; ret.randomize(s_fixedHashEngine); return ret; }
 	using FixedHash<T>::firstBitSet;
 
 	void clear() { ref().cleanse(); }