diff --git a/src/Config.h b/src/Config.h
index 190aa001a..f3985934b 100644
--- a/src/Config.h
+++ b/src/Config.h
@@ -27,7 +27,7 @@
 #define SNAPSHOT_ID 0
 #endif
 
-// Mod ID, used on the http://starcatcher.us/TPT build server
+// Mod ID, used on the https://starcatcher.us/TPT build server
 // The build server will compile for all platforms for you, and send updates in game
 // See jacob1 to get a mod ID
 #ifndef MOD_ID
@@ -85,6 +85,7 @@
 #define MTOS_EXPAND(str) #str
 #define MTOS(str) MTOS_EXPAND(str)
 
+#define SCHEME "https://"
 #define SERVER "powdertoy.co.uk"
 #define STATICSERVER "static.powdertoy.co.uk"
 
diff --git a/src/PowderToySDL.cpp b/src/PowderToySDL.cpp
index 963c2783f..5f7234d86 100644
--- a/src/PowderToySDL.cpp
+++ b/src/PowderToySDL.cpp
@@ -543,7 +543,7 @@ void BlueScreen(String detailMessage)
 	String errorTitle = "ERROR";
 	String errorDetails = "Details: " + detailMessage;
 	String errorHelp = "An unrecoverable fault has occurred, please report the error by visiting the website below\n"
-		"http://" SERVER;
+		SCHEME SERVER;
 	int currentY = 0, width, height;
 	int errorWidth = 0;
 	Graphics::textsize(errorHelp, errorWidth, height);
diff --git a/src/client/Client.cpp b/src/client/Client.cpp
index 80de2cd10..9b2bd60dd 100644
--- a/src/client/Client.cpp
+++ b/src/client/Client.cpp
@@ -128,7 +128,7 @@ void Client::Initialise(ByteString proxyString)
 	stampsLib.close();
 
 	//Begin version check
-	versionCheckRequest = new http::Request("http://" SERVER "/Startup.json");
+	versionCheckRequest = new http::Request(SCHEME SERVER "/Startup.json");
 
 	if (authUser.UserID)
 	{
@@ -138,7 +138,7 @@ void Client::Initialise(ByteString proxyString)
 
 #ifdef UPDATESERVER
 	// use an alternate update server
-	alternateVersionCheckRequest = new http::Request("http://" UPDATESERVER "/Startup.json");
+	alternateVersionCheckRequest = new http::Request(SCHEME UPDATESERVER "/Startup.json");
 	usingAltUpdateServer = true;
 	if (authUser.UserID)
 	{
@@ -977,7 +977,7 @@ RequestStatus Client::UploadSave(SaveInfo & save)
 		}
 #endif
 
-		data = http::Request::SimpleAuth("http://" SERVER "/Save.api", &dataStatus, userID, authUser.SessionID, {
+		data = http::Request::SimpleAuth(SCHEME SERVER "/Save.api", &dataStatus, userID, authUser.SessionID, {
 			{ "Name", save.GetName().ToUtf8() },
 			{ "Description", save.GetDescription().ToUtf8() },
 			{ "Data:save.bin", ByteString(gameData, gameData + gameDataLength) },
@@ -1173,7 +1173,7 @@ RequestStatus Client::ExecVote(int saveID, int direction)
 	{
 		ByteString saveIDText = ByteString::Build(saveID);
 		ByteString userIDText = ByteString::Build(authUser.UserID);
-		data = http::Request::SimpleAuth("http://" SERVER "/Vote.api", &dataStatus, userIDText, authUser.SessionID, {
+		data = http::Request::SimpleAuth(SCHEME SERVER "/Vote.api", &dataStatus, userIDText, authUser.SessionID, {
 			{ "ID", saveIDText },
 			{ "Action", direction == 1 ? "Up" : "Down" },
 		});
@@ -1195,9 +1195,9 @@ unsigned char * Client::GetSaveData(int saveID, int saveDate, int & dataLength)
 	dataLength = 0;
 	ByteString urlStr;
 	if (saveDate)
-		urlStr = ByteString::Build("http://", STATICSERVER, "/", saveID, "_", saveDate, ".cps");
+		urlStr = ByteString::Build(SCHEME, STATICSERVER, "/", saveID, "_", saveDate, ".cps");
 	else
-		urlStr = ByteString::Build("http://", STATICSERVER, "/", saveID, ".cps");
+		urlStr = ByteString::Build(SCHEME, STATICSERVER, "/", saveID, ".cps");
 
 	data = http::Request::Simple(urlStr, &dataStatus);
 
@@ -1245,7 +1245,7 @@ LoginStatus Client::Login(ByteString username, ByteString password, User & user)
 
 	ByteString data;
 	int dataStatus;
-	data = http::Request::Simple("http://" SERVER "/Login.json", &dataStatus, {
+	data = http::Request::Simple(SCHEME SERVER "/Login.json", &dataStatus, {
 		{ "Username", username },
 		{ "Hash", totalHash },
 	});
@@ -1300,7 +1300,7 @@ RequestStatus Client::DeleteSave(int saveID)
 {
 	lastError = "";
 	ByteString data;
-	ByteString url = ByteString::Build("http://", SERVER, "/Browse/Delete.json?ID=", saveID, "&Mode=Delete&Key=", authUser.SessionKey);
+	ByteString url = ByteString::Build(SCHEME, SERVER, "/Browse/Delete.json?ID=", saveID, "&Mode=Delete&Key=", authUser.SessionKey);
 	int dataStatus;
 	if(authUser.UserID)
 	{
@@ -1321,7 +1321,7 @@ RequestStatus Client::AddComment(int saveID, String comment)
 	lastError = "";
 	ByteString data;
 	int dataStatus;
-	ByteString url = ByteString::Build("http://", SERVER, "/Browse/Comments.json?ID=", saveID);
+	ByteString url = ByteString::Build(SCHEME, SERVER, "/Browse/Comments.json?ID=", saveID);
 	if(authUser.UserID)
 	{
 		ByteString userID = ByteString::Build(authUser.UserID);
@@ -1344,7 +1344,7 @@ RequestStatus Client::FavouriteSave(int saveID, bool favourite)
 	ByteStringBuilder urlStream;
 	ByteString data;
 	int dataStatus;
-	urlStream << "http://" << SERVER << "/Browse/Favourite.json?ID=" << saveID << "&Key=" << authUser.SessionKey;
+	urlStream << SCHEME << SERVER << "/Browse/Favourite.json?ID=" << saveID << "&Key=" << authUser.SessionKey;
 	if(!favourite)
 		urlStream << "&Mode=Remove";
 	if(authUser.UserID)
@@ -1366,7 +1366,7 @@ RequestStatus Client::ReportSave(int saveID, String message)
 	lastError = "";
 	ByteString data;
 	int dataStatus;
-	ByteString url = ByteString::Build("http://", SERVER, "/Browse/Report.json?ID=", saveID, "&Key=", authUser.SessionKey);
+	ByteString url = ByteString::Build(SCHEME, SERVER, "/Browse/Report.json?ID=", saveID, "&Key=", authUser.SessionKey);
 	if(authUser.UserID)
 	{
 		ByteString userID = ByteString::Build(authUser.UserID);
@@ -1388,7 +1388,7 @@ RequestStatus Client::UnpublishSave(int saveID)
 	lastError = "";
 	ByteString data;
 	int dataStatus;
-	ByteString url = ByteString::Build("http://", SERVER, "/Browse/Delete.json?ID=", saveID, "&Mode=Unpublish&Key=", authUser.SessionKey);
+	ByteString url = ByteString::Build(SCHEME, SERVER, "/Browse/Delete.json?ID=", saveID, "&Mode=Unpublish&Key=", authUser.SessionKey);
 	if(authUser.UserID)
 	{
 		ByteString userID = ByteString::Build(authUser.UserID);
@@ -1408,7 +1408,7 @@ RequestStatus Client::PublishSave(int saveID)
 	lastError = "";
 	ByteString data;
 	int dataStatus;
-	ByteString url = ByteString::Build("http://", SERVER, "/Browse/View.json?ID=", saveID, "&Key=", authUser.SessionKey);
+	ByteString url = ByteString::Build(SCHEME, SERVER, "/Browse/View.json?ID=", saveID, "&Key=", authUser.SessionKey);
 	if (authUser.UserID)
 	{
 		ByteString userID = ByteString::Build(authUser.UserID);
@@ -1429,7 +1429,7 @@ SaveInfo * Client::GetSave(int saveID, int saveDate)
 {
 	lastError = "";
 	ByteStringBuilder urlStream;
-	urlStream << "http://" << SERVER  << "/Browse/View.json?ID=" << saveID;
+	urlStream << SCHEME << SERVER  << "/Browse/View.json?ID=" << saveID;
 	if(saveDate)
 	{
 		urlStream << "&Date=" << saveDate;
@@ -1504,7 +1504,7 @@ std::vector<std::pair<ByteString, int> > * Client::GetTags(int start, int count,
 	ByteStringBuilder urlStream;
 	ByteString data;
 	int dataStatus;
-	urlStream << "http://" << SERVER << "/Browse/Tags.json?Start=" << start << "&Count=" << count;
+	urlStream << SCHEME << SERVER << "/Browse/Tags.json?Start=" << start << "&Count=" << count;
 	if(query.length())
 	{
 		urlStream << "&Search_Query=";
@@ -1550,7 +1550,7 @@ std::vector<SaveInfo*> * Client::SearchSaves(int start, int count, String query,
 	ByteStringBuilder urlStream;
 	ByteString data;
 	int dataStatus;
-	urlStream << "http://" << SERVER << "/Browse.json?Start=" << start << "&Count=" << count;
+	urlStream << SCHEME << SERVER << "/Browse.json?Start=" << start << "&Count=" << count;
 	if(query.length() || sort.length())
 	{
 		urlStream << "&Search_Query=";
@@ -1618,7 +1618,7 @@ std::list<ByteString> * Client::RemoveTag(int saveID, ByteString tag)
 	std::list<ByteString> * tags = NULL;
 	ByteString data;
 	int dataStatus;
-	ByteString url = ByteString::Build("http://", SERVER, "/Browse/EditTag.json?Op=delete&ID=", saveID, "&Tag=", tag, "&Key=", authUser.SessionKey);
+	ByteString url = ByteString::Build(SCHEME, SERVER, "/Browse/EditTag.json?Op=delete&ID=", saveID, "&Tag=", tag, "&Key=", authUser.SessionKey);
 	if(authUser.UserID)
 	{
 		ByteString userID = ByteString::Build(authUser.UserID);
@@ -1657,7 +1657,7 @@ std::list<ByteString> * Client::AddTag(int saveID, ByteString tag)
 	std::list<ByteString> * tags = NULL;
 	ByteString data;
 	int dataStatus;
-	ByteString url = ByteString::Build("http://", SERVER, "/Browse/EditTag.json?Op=add&ID=", saveID, "&Tag=", tag, "&Key=", authUser.SessionKey);
+	ByteString url = ByteString::Build(SCHEME, SERVER, "/Browse/EditTag.json?Op=add&ID=", saveID, "&Tag=", tag, "&Key=", authUser.SessionKey);
 	if(authUser.UserID)
 	{
 		ByteString userID = ByteString::Build(authUser.UserID);
diff --git a/src/client/http/AvatarRequest.cpp b/src/client/http/AvatarRequest.cpp
index 7774f28b0..00f70b43a 100644
--- a/src/client/http/AvatarRequest.cpp
+++ b/src/client/http/AvatarRequest.cpp
@@ -4,7 +4,7 @@
 namespace http
 {
 	AvatarRequest::AvatarRequest(ByteString username, int width, int height) :
-		ImageRequest(ByteString::Build("http://" STATICSERVER "/avatars/", username, ".pti"), width, height)
+		ImageRequest(ByteString::Build(SCHEME STATICSERVER "/avatars/", username, ".pti"), width, height)
 	{
 	}
 
diff --git a/src/client/http/GetUserInfoRequest.cpp b/src/client/http/GetUserInfoRequest.cpp
index 40c7692c2..009b097b4 100644
--- a/src/client/http/GetUserInfoRequest.cpp
+++ b/src/client/http/GetUserInfoRequest.cpp
@@ -3,7 +3,7 @@
 namespace http
 {
 	GetUserInfoRequest::GetUserInfoRequest(ByteString username) :
-		APIRequest("http://" SERVER "/User.json?Name=" + username)
+		APIRequest(SCHEME SERVER "/User.json?Name=" + username)
 	{
 	}
 
diff --git a/src/client/http/SaveUserInfoRequest.cpp b/src/client/http/SaveUserInfoRequest.cpp
index 74f0c8a3c..fa61defd1 100644
--- a/src/client/http/SaveUserInfoRequest.cpp
+++ b/src/client/http/SaveUserInfoRequest.cpp
@@ -3,7 +3,7 @@
 namespace http
 {
 	SaveUserInfoRequest::SaveUserInfoRequest(UserInfo info) :
-		APIRequest("http://" SERVER "/Profile.json")
+		APIRequest(SCHEME SERVER "/Profile.json")
 	{
 		AddPostData({
 			{ "Location", info.location.ToUtf8() },
diff --git a/src/client/http/ThumbnailRequest.cpp b/src/client/http/ThumbnailRequest.cpp
index 0ce4e5ac6..03c6e28dc 100644
--- a/src/client/http/ThumbnailRequest.cpp
+++ b/src/client/http/ThumbnailRequest.cpp
@@ -6,8 +6,8 @@ namespace http
 	ThumbnailRequest::ThumbnailRequest(int saveID, int saveDate, int width, int height) :
 		ImageRequest((
 			saveDate
-			? ByteString::Build("http://" STATICSERVER "/", saveID, "_", saveDate, "_small.pti")
-			: ByteString::Build("http://" STATICSERVER "/", saveID, "_small.pti")
+			? ByteString::Build(SCHEME STATICSERVER "/", saveID, "_", saveDate, "_small.pti")
+			: ByteString::Build(SCHEME STATICSERVER "/", saveID, "_small.pti")
 		), width, height)
 	{
 	}
diff --git a/src/gui/game/GameController.cpp b/src/gui/game/GameController.cpp
index 31d498454..c9173455a 100644
--- a/src/gui/game/GameController.cpp
+++ b/src/gui/game/GameController.cpp
@@ -687,7 +687,7 @@ bool GameController::MouseUp(int x, int y, unsigned button, char type)
 						case 't':
 						{
 							// buff is already confirmed to be a number by sign::splitsign
-							Platform::OpenURI(ByteString::Build("http://powdertoy.co.uk/Discussions/Thread/View.html?Thread=", link.ToUtf8()));
+							Platform::OpenURI(ByteString::Build(SCHEME "powdertoy.co.uk/Discussions/Thread/View.html?Thread=", link.ToUtf8()));
 							break;
 						}
 						case 's':
@@ -1716,9 +1716,9 @@ void GameController::RunUpdater()
 #else
 
 #ifdef UPDATESERVER
-	ByteString file = ByteString::Build("https://", UPDATESERVER, Client::Ref().GetUpdateInfo().File);
+	ByteString file = ByteString::Build(SCHEME, UPDATESERVER, Client::Ref().GetUpdateInfo().File);
 #else
-	ByteString file = ByteString::Build("https://", SERVER, Client::Ref().GetUpdateInfo().File);
+	ByteString file = ByteString::Build(SCHEME, SERVER, Client::Ref().GetUpdateInfo().File);
 #endif
 
 	Platform::OpenURI(file);
diff --git a/src/gui/preview/PreviewController.cpp b/src/gui/preview/PreviewController.cpp
index ea19620c7..d55454f17 100644
--- a/src/gui/preview/PreviewController.cpp
+++ b/src/gui/preview/PreviewController.cpp
@@ -153,7 +153,7 @@ void PreviewController::FavouriteSave()
 
 void PreviewController::OpenInBrowser()
 {
-	ByteString uri = ByteString::Build("http://", SERVER, "/Browse/View.html?ID=", saveId);
+	ByteString uri = ByteString::Build(SCHEME, SERVER, "/Browse/View.html?ID=", saveId);
 	Platform::OpenURI(uri);
 }
 
diff --git a/src/gui/preview/PreviewModel.cpp b/src/gui/preview/PreviewModel.cpp
index 8485ab0dc..2d7c6e166 100644
--- a/src/gui/preview/PreviewModel.cpp
+++ b/src/gui/preview/PreviewModel.cpp
@@ -72,13 +72,13 @@ void PreviewModel::UpdateSave(int saveID, int saveDate)
 
 	ByteString url;
 	if (saveDate)
-		url = ByteString::Build("http://", STATICSERVER, "/", saveID, "_", saveDate, ".cps");
+		url = ByteString::Build(SCHEME, STATICSERVER, "/", saveID, "_", saveDate, ".cps");
 	else
-		url = ByteString::Build("http://", STATICSERVER, "/", saveID, ".cps");
+		url = ByteString::Build(SCHEME, STATICSERVER, "/", saveID, ".cps");
 	saveDataDownload = new http::Request(url);
 	saveDataDownload->Start();
 
-	url = ByteString::Build("http://", SERVER , "/Browse/View.json?ID=", saveID);
+	url = ByteString::Build(SCHEME, SERVER , "/Browse/View.json?ID=", saveID);
 	if (saveDate)
 		url += ByteString::Build("&Date=", saveDate);
 	saveInfoDownload = new http::Request(url);
@@ -89,7 +89,7 @@ void PreviewModel::UpdateSave(int saveID, int saveDate)
 	{
 		commentsLoaded = false;
 
-		url = ByteString::Build("http://", SERVER, "/Browse/Comments.json?ID=", saveID, "&Start=", (commentsPageNumber-1)*20, "&Count=20");
+		url = ByteString::Build(SCHEME, SERVER, "/Browse/Comments.json?ID=", saveID, "&Start=", (commentsPageNumber-1)*20, "&Count=20");
 		commentsDownload = new http::Request(url);
 		commentsDownload->AuthHeaders(ByteString::Build(Client::Ref().GetAuthUser().UserID), Client::Ref().GetAuthUser().SessionID);
 		commentsDownload->Start();
@@ -141,7 +141,7 @@ void PreviewModel::UpdateComments(int pageNumber)
 		commentsPageNumber = pageNumber;
 		if (!GetDoOpen())
 		{
-			ByteString url = ByteString::Build("http://", SERVER, "/Browse/Comments.json?ID=", saveID, "&Start=", (commentsPageNumber-1)*20, "&Count=20");
+			ByteString url = ByteString::Build(SCHEME, SERVER, "/Browse/Comments.json?ID=", saveID, "&Start=", (commentsPageNumber-1)*20, "&Count=20");
 			commentsDownload = new http::Request(url);
 			commentsDownload->AuthHeaders(ByteString::Build(Client::Ref().GetAuthUser().UserID), Client::Ref().GetAuthUser().SessionID);
 			commentsDownload->Start();
@@ -166,7 +166,7 @@ void PreviewModel::OnSaveReady()
 	{
 		GameSave *gameSave = new GameSave(*saveData);
 		if (gameSave->fromNewerVersion)
-			new ErrorMessage("This save is from a newer version", "Please update TPT in game or at http://powdertoy.co.uk");
+			new ErrorMessage("This save is from a newer version", "Please update TPT in game or at https://powdertoy.co.uk");
 		saveInfo->SetGameSave(gameSave);
 	}
 	catch(ParseException &e)
@@ -239,7 +239,7 @@ bool PreviewModel::ParseSaveInfo(ByteString &saveInfoResponse)
 				saveDataDownload->Cancel();
 			delete saveData;
 			saveData = NULL;
-			saveDataDownload = new http::Request(ByteString::Build("http://", STATICSERVER, "/2157797.cps"));
+			saveDataDownload = new http::Request(ByteString::Build(SCHEME, STATICSERVER, "/2157797.cps"));
 			saveDataDownload->Start();
 		}
 		return true;
diff --git a/src/gui/profile/ProfileActivity.cpp b/src/gui/profile/ProfileActivity.cpp
index 0cbb383b6..70d844e3a 100644
--- a/src/gui/profile/ProfileActivity.cpp
+++ b/src/gui/profile/ProfileActivity.cpp
@@ -81,7 +81,7 @@ void ProfileActivity::setUserInfo(UserInfo newInfo)
 	public:
 		void ActionCallback(ui::Button * sender_) override
 		{
-			Platform::OpenURI("http://" SERVER "/Profile/Avatar.html");
+			Platform::OpenURI(SCHEME SERVER "/Profile/Avatar.html");
 		}
 	};
 
diff --git a/src/gui/update/UpdateActivity.cpp b/src/gui/update/UpdateActivity.cpp
index a4b1f1387..9f8fd288d 100644
--- a/src/gui/update/UpdateActivity.cpp
+++ b/src/gui/update/UpdateActivity.cpp
@@ -115,9 +115,9 @@ private:
 UpdateActivity::UpdateActivity() {
 	ByteString file;
 #ifdef UPDATESERVER
-	file = ByteString::Build("http://", UPDATESERVER, Client::Ref().GetUpdateInfo().File);
+	file = ByteString::Build(SCHEME, UPDATESERVER, Client::Ref().GetUpdateInfo().File);
 #else
-	file = ByteString::Build("http://", SERVER, Client::Ref().GetUpdateInfo().File);
+	file = ByteString::Build(SCHEME, SERVER, Client::Ref().GetUpdateInfo().File);
 #endif
 	updateDownloadTask = new UpdateDownloadTask(file, this);
 	updateWindow = new TaskWindow("Downloading update...", updateDownloadTask, true);
@@ -149,7 +149,7 @@ void UpdateActivity::NotifyError(Task * sender)
 			if (result == ConfirmPrompt::ResultOkay)
 			{
 #ifndef UPDATESERVER
-				Platform::OpenURI("http://powdertoy.co.uk/Download.html");
+				Platform::OpenURI(SCHEME "powdertoy.co.uk/Download.html");
 #endif
 			}
 			a->Exit();
diff --git a/src/lua/LegacyLuaAPI.cpp b/src/lua/LegacyLuaAPI.cpp
index 316a1db71..b5706a496 100644
--- a/src/lua/LegacyLuaAPI.cpp
+++ b/src/lua/LegacyLuaAPI.cpp
@@ -1350,7 +1350,7 @@ int luatpt_getscript(lua_State* l)
 	int runScript = luaL_optint(l, 3, 0);
 	int confirmPrompt = luaL_optint(l, 4, 1);
 
-	ByteString url = ByteString::Build("http://starcatcher.us/scripts/main.lua?get=", scriptID);
+	ByteString url = ByteString::Build(SCHEME "starcatcher.us/scripts/main.lua?get=", scriptID);
 	if (confirmPrompt && !ConfirmPrompt::Blocking("Do you want to install script?", url.FromUtf8(), "Install"))
 		return 0;