diff --git a/SiaDrive.Api/SiaApi.cpp b/SiaDrive.Api/SiaApi.cpp
index 6f368ce..8269687 100644
--- a/SiaDrive.Api/SiaApi.cpp
+++ b/SiaDrive.Api/SiaApi.cpp
@@ -3,9 +3,10 @@
 
 using namespace Sia::Api;
 
-CSiaApi::CSiaApi(const String& host, const std::uint16_t& port) :
-	_wallet(new CSiaWallet())
+CSiaApi::CSiaApi(const SiaHostConfig& hostConfig) :
+	_wallet(new CSiaWallet(_siaCurl))
 {
+	_siaCurl.SetHostConfig(hostConfig);
 }
 
 CSiaApi::~CSiaApi()
@@ -13,6 +14,11 @@ CSiaApi::~CSiaApi()
 	_wallet->Unlock();
 }
 
+String CSiaApi::GetServerVersion() const
+{
+	return _siaCurl.GetServerVersion();
+}
+
 CSiaWalletPtr CSiaApi::GetWallet() const
 {
 	return _wallet;
diff --git a/SiaDrive.Api/SiaApi.h b/SiaDrive.Api/SiaApi.h
index 6caee42..c473607 100644
--- a/SiaDrive.Api/SiaApi.h
+++ b/SiaDrive.Api/SiaApi.h
@@ -1,5 +1,6 @@
 #pragma once
 #include "SiaCommon.h"
+#include "SiaCurl.h"
 
 NS_BEGIN(Sia)
 NS_BEGIN(Api)
@@ -7,7 +8,8 @@ NS_BEGIN(Api)
 class AFX_EXT_CLASS CSiaApi
 {
 public:
-	enum class _SiaApiError {
+	enum class _SiaApiError 
+	{
 		Success,
 		NotImplemented,
 		WalletLocked,
@@ -19,11 +21,14 @@ public:
 	{
 		friend CSiaApi;
 	private:
-		_CSiaWallet();
+		_CSiaWallet(CSiaCurl& siaCurl);
 
 	public:
 		~_CSiaWallet();
 
+	private:
+		CSiaCurl& _siaCurl;
+
 	// Properties
 		Property(bool, Created, public, private)
 		Property(bool, Locked, public, private)
@@ -36,22 +41,23 @@ public:
 	};
 
 public:
-	CSiaApi(const String& host, const std::uint16_t& port);
+	CSiaApi(const SiaHostConfig& hostConfig);
 
 public:
 	~CSiaApi();
 
 private:
+	CSiaCurl _siaCurl;
 	std::shared_ptr<_CSiaWallet> _wallet;
 
 public:
 	std::shared_ptr<_CSiaWallet> GetWallet() const;
+	String GetServerVersion() const;
 
 };
 
 typedef CSiaApi::_SiaApiError SiaApiError;
 typedef CSiaApi::_CSiaWallet CSiaWallet;
 typedef std::shared_ptr<CSiaApi::_CSiaWallet> CSiaWalletPtr;
-#define API_SUCCESS(x) (x == SiaApiError::Success)
 
 NS_END(2)
\ No newline at end of file
diff --git a/SiaDrive.Api/SiaCommon.h b/SiaDrive.Api/SiaCommon.h
index 3c077a3..3a79019 100644
--- a/SiaDrive.Api/SiaCommon.h
+++ b/SiaDrive.Api/SiaCommon.h
@@ -32,6 +32,9 @@ set_access:\
 
 struct SiaHostConfig
 {
-	std::string HostName;
+	String HostName;
 	std::uint16_t HostPort;
-};
\ No newline at end of file
+	String RequiredVersion;
+};
+
+#define API_SUCCESS(t, x) (x == t::Success)
\ No newline at end of file
diff --git a/SiaDrive.Api/SiaCurl.cpp b/SiaDrive.Api/SiaCurl.cpp
index 5da9bea..08b7aa5 100644
--- a/SiaDrive.Api/SiaCurl.cpp
+++ b/SiaDrive.Api/SiaCurl.cpp
@@ -1,12 +1,13 @@
 #include "stdafx.h"
 #include "SiaCurl.h"
-#include <curl\curl.h>
+#include <curl/curl.h>
 using namespace Sia::Api;
 
 CSiaCurl::CSiaCurl() :
 	_curlHandle(curl_easy_init())
 {
-	SetHostConfig({ "localhost", 9980 });
+	SetHostConfig({ L"localhost", 9980, L""});
+	curl_easy_setopt(_curlHandle, CURLOPT_USERAGENT, "Sia-Agent");
 }
 
 CSiaCurl::~CSiaCurl()
@@ -14,31 +15,73 @@ CSiaCurl::~CSiaCurl()
 	curl_easy_cleanup(_curlHandle);
 }
 
-CStringA CSiaCurl::ConstructPath(const CString& relativePath) const
+SiaCurlError CSiaCurl::_Get(const String& path, json& response) const
 {
-	const CStringA ret = CStringA("http://") + GetHostConfig().HostName.c_str() + ":" + std::to_string(GetHostConfig().HostPort).c_str() + CW2A(relativePath);
+	std::string result;
+	SiaCurlError ret = SiaCurlError::Success;
+	if (API_SUCCESS(SiaCurlError, ret))
+	{
+		curl_easy_setopt(_curlHandle, CURLOPT_URL, ConstructPath(path).c_str());
+		curl_easy_setopt(_curlHandle, CURLOPT_WRITEFUNCTION, static_cast<size_t(*)(char*, size_t, size_t, void *)>([](char *buffer, size_t size, size_t nitems, void *outstream) -> size_t
+		{
+			(*reinterpret_cast<std::string*>(outstream)) += std::string(reinterpret_cast<LPCSTR>(buffer), size * nitems);
+			return size * nitems;
+		}));
+		curl_easy_setopt(_curlHandle, CURLOPT_WRITEDATA, &result);
+		const CURLcode res = curl_easy_perform(_curlHandle);
+		if (res != CURLE_OK)
+		{
+			ret = SiaCurlError::Failed;
+		}
+
+		response = json::parse(result.c_str());
+	}
+
 	return ret;
 }
 
-SiaCurlError CSiaCurl::Get(const CString& path, json& response)
+bool CSiaCurl::CheckVersion(SiaCurlError& error) const
 {
-	CStringA result;
-	SiaCurlError ret = SiaCurlError::Success;
-	curl_easy_setopt(_curlHandle, CURLOPT_USERAGENT, "Sia-Agent");
-	curl_easy_setopt(_curlHandle, CURLOPT_URL, static_cast<LPCSTR>(ConstructPath(path)));
-	curl_easy_setopt(_curlHandle, CURLOPT_WRITEFUNCTION, static_cast<size_t(*)(char*, size_t, size_t, void *)>([](char *buffer, size_t size, size_t nitems, void *outstream) -> size_t
+	error = SiaCurlError::InvalidRequiredVersion;
+	if (GetHostConfig().RequiredVersion.length())
 	{
-		(*reinterpret_cast<CStringA*>(outstream)) += CString(reinterpret_cast<LPCSTR>(buffer), size * nitems);
-		return size * nitems;
-	}));
-	curl_easy_setopt(_curlHandle, CURLOPT_WRITEDATA, &result);
-	const CURLcode res = curl_easy_perform(_curlHandle);
-	if (res != CURLE_OK)
-	{
-		ret = SiaCurlError::Failed;
+		error = SiaCurlError::NoResponse;
+		const String serverVersion = GetServerVersion();
+		if (serverVersion.length())
+		{
+			error = (serverVersion == GetHostConfig().RequiredVersion) ? SiaCurlError::Success : SiaCurlError::ServerVersionMismatch;
+		}
 	}
 
-	response = json::parse((LPCSTR)result);
+	return API_SUCCESS(SiaCurlError, error);
+}
+
+std::string CSiaCurl::ConstructPath(const String& relativePath) const
+{
+	const std::string ret = "http://" + std::string(CW2A(GetHostConfig().HostName.c_str()))+ ":" + std::to_string(GetHostConfig().HostPort) + std::string(CW2A(relativePath.c_str()));
+	return ret;
+}
+
+String CSiaCurl::GetServerVersion() const
+{
+	json response;
+	if (API_SUCCESS(SiaCurlError, _Get(L"/daemon/version", response)))
+	{
+		return String(CA2W(response["version"].get<std::string>().c_str()));
+	}
+
+	return L"";
+}
+
+SiaCurlError CSiaCurl::Get(const String& path, json& response) const
+{
+	std::string result;
+
+	SiaCurlError ret;
+	if (CheckVersion(ret))
+	{
+		ret = _Get(path, response);
+	}
 
 	return ret;
 }
\ No newline at end of file
diff --git a/SiaDrive.Api/SiaCurl.h b/SiaDrive.Api/SiaCurl.h
index 3e412b1..a1d4fc4 100644
--- a/SiaDrive.Api/SiaCurl.h
+++ b/SiaDrive.Api/SiaCurl.h
@@ -12,6 +12,9 @@ public:
 	enum class _SiaCurlError
 	{
 		Success,
+		ServerVersionMismatch,
+		InvalidRequiredVersion,
+		NoResponse,
 		Failed
 	};
 
@@ -27,10 +30,13 @@ private:
 	Property(SiaHostConfig, HostConfig, public, public)
 
 private:
-	CStringA ConstructPath(const CString& relativePath) const;
+	std::string ConstructPath(const String& relativePath) const;
+	_SiaCurlError _Get(const String& path, json& response) const;
+	bool CheckVersion(_SiaCurlError& error) const;
 
 public:
-	_SiaCurlError Get(const CString& path, json& result);
+	String GetServerVersion() const;
+	_SiaCurlError Get(const String& path, json& result) const;
 };
 
 typedef CSiaCurl::_SiaCurlError SiaCurlError;
diff --git a/SiaDrive.Api/SiaWallet.cpp b/SiaDrive.Api/SiaWallet.cpp
index 47c478f..78290e3 100644
--- a/SiaDrive.Api/SiaWallet.cpp
+++ b/SiaDrive.Api/SiaWallet.cpp
@@ -3,7 +3,10 @@
 
 using namespace Sia::Api;
 
-CSiaApi::_CSiaWallet::_CSiaWallet()
+CSiaApi::_CSiaWallet::_CSiaWallet(CSiaCurl& siaCurl) :
+	_siaCurl(siaCurl),
+	_Created(false),
+	_Locked(false)
 {
 
 }
@@ -28,7 +31,7 @@ SiaApiError CSiaApi::_CSiaWallet::Restore(const String& seed)
 SiaApiError CSiaApi::_CSiaWallet::Lock()
 {
 	SiaApiError error = GetCreated() ? (GetLocked() ? SiaApiError::WalletLocked : SiaApiError::Success) : SiaApiError::WalletNotCreated;
-	if (API_SUCCESS(error))
+	if (API_SUCCESS(SiaApiError, error))
 	{
 
 	}
@@ -38,7 +41,7 @@ SiaApiError CSiaApi::_CSiaWallet::Lock()
 SiaApiError CSiaApi::_CSiaWallet::Unlock()
 {
 	SiaApiError error = GetCreated() ? (GetLocked() ? SiaApiError::Success : SiaApiError::WalletUnlocked) : SiaApiError::WalletNotCreated;
-	if (API_SUCCESS(error))
+	if (API_SUCCESS(SiaApiError, error))
 	{
 
 	}
diff --git a/SiaDrive.Api/json.hpp b/SiaDrive.Api/json.hpp
index 5fdd83d..fff8d6c 100644
--- a/SiaDrive.Api/json.hpp
+++ b/SiaDrive.Api/json.hpp
@@ -29,6 +29,12 @@ SOFTWARE.
 #ifndef NLOHMANN_JSON_HPP
 #define NLOHMANN_JSON_HPP
 
+#ifdef _WIN32
+#ifdef max
+#undef max
+#endif
+#endif
+
 #include <algorithm> // all_of, for_each, transform
 #include <array> // array
 #include <cassert> // assert
diff --git a/UnitTests/SiaCurlTests.cpp b/UnitTests/SiaCurlTests.cpp
index 6fd6aa9..dad5d26 100644
--- a/UnitTests/SiaCurlTests.cpp
+++ b/UnitTests/SiaCurlTests.cpp
@@ -13,12 +13,31 @@ namespace UnitTests
 		TEST_METHOD(GetBasicTest)
 		{
 			CSiaCurl s;
-			s.SetHostConfig({ "localhost", 9980 });
+			s.SetHostConfig({ L"localhost", 9980, L"1.1.0" });
 
 			json result;
 			SiaCurlError err = s.Get(L"/daemon/version", result);
 			Assert::IsTrue(err == SiaCurlError::Success);
-			Assert::IsTrue(result["version"].is_string());
+		}
+
+		TEST_METHOD(EmptyHostConfigRequiredVersion)
+		{
+			CSiaCurl s;
+			s.SetHostConfig({ L"localhost", 9980, L"" });
+
+			json result;
+			SiaCurlError err = s.Get(L"/daemon/version", result);
+			Assert::IsTrue(err == SiaCurlError::InvalidRequiredVersion);
+		}
+
+		TEST_METHOD(ServerVersionDoesNotMatchRequiredVersion)
+		{
+			CSiaCurl s;
+			s.SetHostConfig({ L"localhost", 9980, L"ouaoeuaoeuaoeu" });
+
+			json result;
+			SiaCurlError err = s.Get(L"/daemon/version", result);
+			Assert::IsTrue(err == SiaCurlError::ServerVersionMismatch);
 		}
 
 	};
diff --git a/UnitTests/UnitTests.vcxproj b/UnitTests/UnitTests.vcxproj
index 5780c35..22c0bc5 100644
--- a/UnitTests/UnitTests.vcxproj
+++ b/UnitTests/UnitTests.vcxproj
@@ -45,7 +45,7 @@
     <UseDebugLibraries>true</UseDebugLibraries>
     <PlatformToolset>v140</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
-    <UseOfMfc>false</UseOfMfc>
+    <UseOfMfc>Dynamic</UseOfMfc>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
@@ -53,7 +53,7 @@
     <PlatformToolset>v140</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <UseOfMfc>false</UseOfMfc>
+    <UseOfMfc>Dynamic</UseOfMfc>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
@@ -90,7 +90,7 @@
       <PrecompiledHeader>Use</PrecompiledHeader>
       <WarningLevel>Level3</WarningLevel>
       <Optimization>Disabled</Optimization>
-      <AdditionalIncludeDirectories>..\SiaDrive.Api;$(VCInstallDir)UnitTest\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\SiaDrive.Api;..\SiaDrive.Api;$(VCInstallDir)UnitTest\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>WIN32;_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <UseFullPaths>true</UseFullPaths>
     </ClCompile>
@@ -106,7 +106,7 @@
       <PrecompiledHeader>Use</PrecompiledHeader>
       <WarningLevel>Level3</WarningLevel>
       <Optimization>Disabled</Optimization>
-      <AdditionalIncludeDirectories>$(VCInstallDir)UnitTest\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\SiaDrive.Api;$(VCInstallDir)UnitTest\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <UseFullPaths>true</UseFullPaths>
     </ClCompile>
@@ -122,7 +122,7 @@
       <Optimization>MaxSpeed</Optimization>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
-      <AdditionalIncludeDirectories>..\SiaDrive.Api;$(VCInstallDir)UnitTest\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\SiaDrive.Api;..\SiaDrive.Api;$(VCInstallDir)UnitTest\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>WIN32;NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <UseFullPaths>true</UseFullPaths>
     </ClCompile>
@@ -142,7 +142,7 @@
       <Optimization>MaxSpeed</Optimization>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
-      <AdditionalIncludeDirectories>$(VCInstallDir)UnitTest\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\SiaDrive.Api;$(VCInstallDir)UnitTest\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <UseFullPaths>true</UseFullPaths>
     </ClCompile>