diff --git a/cmake/EthDependencies.cmake b/cmake/EthDependencies.cmake
index fb2aafd47..f957dd3ac 100644
--- a/cmake/EthDependencies.cmake
+++ b/cmake/EthDependencies.cmake
@@ -71,6 +71,12 @@ if (GMP_FOUND)
 	message(" - gmp lib   : ${GMP_LIBRARY}")
 endif()
 
+# curl is only requried for tests
+# TODO specify min curl version, on windows we are currenly using 7.29
+find_package (curl)
+message(" - curl header: ${CURL_INCLUDE_DIR}")
+message(" - curl lib   : ${CURL_LIBRARY}")
+
 # TODO make headless client optional
 find_package (QT5Core REQUIRED)
 find_package (QT5Gui REQUIRED)
diff --git a/extdep/CMakeLists.txt b/extdep/CMakeLists.txt
index cea32c80f..031093f56 100644
--- a/extdep/CMakeLists.txt
+++ b/extdep/CMakeLists.txt
@@ -44,6 +44,7 @@ else()
 	eth_download(qt)
 	eth_download(cryptopp)
 	eth_download(boost)
+	eth_download(curl)
 
 endif()
 
diff --git a/libp2p/Host.cpp b/libp2p/Host.cpp
index 93a6ce672..52ceb5df3 100644
--- a/libp2p/Host.cpp
+++ b/libp2p/Host.cpp
@@ -42,7 +42,7 @@ Host::Host(std::string const& _clientVersion, NetworkPreferences const& _n, bool
 	m_clientVersion(_clientVersion),
 	m_netPrefs(_n),
 	m_ifAddresses(Network::getInterfaceAddresses()),
-	m_ioService(2),
+	m_ioService(),
 	m_acceptorV4(m_ioService),
 	m_key(KeyPair::create())
 {
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index e27e0949d..3beb36643 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -18,6 +18,7 @@ target_link_libraries(testeth secp256k1)
 target_link_libraries(testeth solidity)
 target_link_libraries(testeth webthree)
 target_link_libraries(testeth ${Boost_UNIT_TEST_FRAMEWORK_LIBRARY_RELEASE})
+target_link_libraries(testeth ${CURL_LIBRARY})
 
 if (JSON_RPC_CPP_FOUND)
 	target_link_libraries(testeth web3jsonrpc)