diff --git a/thcrap/src/jansson_ex.cpp b/thcrap/src/jansson_ex.cpp
index d7ac9219..12f1120c 100644
--- a/thcrap/src/jansson_ex.cpp
+++ b/thcrap/src/jansson_ex.cpp
@@ -364,7 +364,7 @@ json_t *json5_loadb(const void *buffer, size_t size, char **error)
 		json5pp::impl::imemstream istream(buffer, size);
 		json5 = json5pp::parse5(istream, false);
 	}
-	catch (json5pp::syntax_error e) {
+	catch (const json5pp::syntax_error& e) {
 		if (error) {
 			*error = strdup(e.what());
 		}
diff --git a/thcrap/src/repo.cpp b/thcrap/src/repo.cpp
index ea55b63f..dc505875 100644
--- a/thcrap/src/repo.cpp
+++ b/thcrap/src/repo.cpp
@@ -104,7 +104,7 @@ bool RepoWrite(const repo_t *repo)
 	try {
 		std::filesystem::create_directories(repo_dir);
 	}
-	catch (std::filesystem::filesystem_error e) {
+	catch (const std::filesystem::filesystem_error& e) {
 		log_printf("Failed to create repo folder %s.\nError %d: %s\n", (const char*)repo_dir.u8string().c_str(), e.code().value(), e.what());
 		return false;
 	}
diff --git a/thcrap/src/search.cpp b/thcrap/src/search.cpp
index 8c11683c..7461dec1 100644
--- a/thcrap/src/search.cpp
+++ b/thcrap/src/search.cpp
@@ -190,9 +190,9 @@ static DWORD WINAPI SearchThread(void *param_)
 				if (ent->path().extension() == L".exe")
 					SearchCheckExe(*state, *ent);
 			}
-			catch (std::system_error &) {}
+			catch (const std::system_error&) {}
 		}
-	} catch (std::system_error &) {}
+	} catch (const std::system_error&) {}
 
 	return 0;
 }
diff --git a/thcrap_update/src/downloader.cpp b/thcrap_update/src/downloader.cpp
index f9fe3a06..872eaf87 100644
--- a/thcrap_update/src/downloader.cpp
+++ b/thcrap_update/src/downloader.cpp
@@ -22,7 +22,9 @@ std::list<DownloadUrl> Downloader::serversListToDownloadUrlList(const std::list<
 }
 
 void Downloader::addFile(const std::list<std::string>& serversUrl, std::string filePath,
-                         File::success_t successCallback, File::failure_t failureCallback, File::progress_t progressCallback)
+                         File::SuccessCallback successCallback,
+                         File::FailureCallback failureCallback,
+                         File::ProgressCallback progressCallback)
 {
     std::scoped_lock lock(this->mutex);
 
@@ -41,7 +43,9 @@ void Downloader::addFile(const std::list<std::string>& serversUrl, std::string f
 }
 
 void Downloader::addFile(char** serversUrl, std::string filePath,
-                         File::success_t successCallback, File::failure_t failureCallback, File::progress_t progressCallback)
+                         File::SuccessCallback successCallback,
+                         File::FailureCallback failureCallback,
+                         File::ProgressCallback progressCallback)
 {
     std::list<std::string> serversList;
 
diff --git a/thcrap_update/src/downloader.h b/thcrap_update/src/downloader.h
index fd440a29..34939d83 100644
--- a/thcrap_update/src/downloader.h
+++ b/thcrap_update/src/downloader.h
@@ -22,13 +22,13 @@ class Downloader
     Downloader();
     ~Downloader();
     void addFile(const std::list<std::string>& servers, std::string filename,
-                 File::success_t successCallback = File::defaultSuccessFunction,
-                 File::failure_t failureCallback = File::defaultFailureFunction,
-                 File::progress_t progressCallback = File::defaultProgressFunction);
+                 File::SuccessCallback successCallback = File::defaultSuccessFunction,
+                 File::FailureCallback failureCallback = File::defaultFailureFunction,
+                 File::ProgressCallback progressCallback = File::defaultProgressFunction);
     void addFile(char** servers, std::string filename,
-                 File::success_t successCallback = File::defaultSuccessFunction,
-                 File::failure_t failureCallback = File::defaultFailureFunction,
-                 File::progress_t progressCallback = File::defaultProgressFunction);
+                 File::SuccessCallback successCallback = File::defaultSuccessFunction,
+                 File::FailureCallback failureCallback = File::defaultFailureFunction,
+                 File::ProgressCallback progressCallback = File::defaultProgressFunction);
     size_t current() const;
     size_t total() const;
     void wait();
diff --git a/thcrap_update/src/file.cpp b/thcrap_update/src/file.cpp
index c7c7b2dc..c69d6018 100644
--- a/thcrap_update/src/file.cpp
+++ b/thcrap_update/src/file.cpp
@@ -8,14 +8,14 @@
 using namespace std::string_literals;
 
 File::File(std::list<DownloadUrl>&& urls,
-           success_t successCallback,
-           failure_t failureCallback,
-           progress_t progressCallback)
+           SuccessCallback successCallback,
+           FailureCallback failureCallback,
+           ProgressCallback progressCallback)
     : status(Status::Todo), urls(urls),
     userSuccessCallback(successCallback), userFailureCallback(failureCallback), userProgressCallback(progressCallback)
 {
     if (urls.empty()) {
-        throw new std::invalid_argument("Input URL list must not be empty");
+        throw std::invalid_argument("Input URL list must not be empty");
     }
 }
 
@@ -62,7 +62,7 @@ void File::download(IHttpHandle& http, const DownloadUrl& url)
         }
     );
     if (!status) {
-        if (status.get() == HttpStatus::ServerError || status.get() == HttpStatus::SystemError) {
+        if (status.get() == HttpStatus::Status::ServerError || status.get() == HttpStatus::Status::SystemError) {
             // If the server is dead, we don't want to continue using it.
             // If the library returned an error, future downloads to the
             // same server are also likely to fail.
@@ -105,10 +105,10 @@ extern "C" int download_single_file(const char* url, const char* fn) {
             return 0;
         }
         else {
-            return res.second.get();
+            return static_cast<int>(res.second.get());
         }
     }
-    catch (std::bad_alloc e) {
-        return HttpStatus::SystemError;
+    catch (const std::bad_alloc& e) {
+        return static_cast<int>(HttpStatus::Status::SystemError);
     }
 }
diff --git a/thcrap_update/src/file.h b/thcrap_update/src/file.h
index 4226cad4..a10afff1 100644
--- a/thcrap_update/src/file.h
+++ b/thcrap_update/src/file.h
@@ -11,9 +11,9 @@
 class File
 {
 public:
-    typedef std::function<void (const DownloadUrl& url, std::vector<uint8_t>& data)> success_t;
-    typedef std::function<void (const DownloadUrl& url, HttpStatus status)> failure_t;
-    typedef std::function<bool (const DownloadUrl& url, size_t file_progress, size_t file_size)> progress_t;
+    using SuccessCallback = std::function<void (const DownloadUrl& url, std::vector<uint8_t>& data)>;
+    using FailureCallback = std::function<void (const DownloadUrl& url, HttpStatus status)>;
+    using ProgressCallback = std::function<bool (const DownloadUrl& url, size_t file_progress, size_t file_size)>;
     static void defaultSuccessFunction(const DownloadUrl&, std::vector<uint8_t>&) {}
     static void defaultFailureFunction(const DownloadUrl&, HttpStatus) {}
     static bool defaultProgressFunction(const DownloadUrl&, size_t, size_t) { return true; }
@@ -35,9 +35,9 @@ class File
     std::list<DownloadUrl> urls;
 
     // User-provided callbacks
-    success_t userSuccessCallback;
-    failure_t userFailureCallback;
-    progress_t userProgressCallback;
+    SuccessCallback userSuccessCallback;
+    FailureCallback userFailureCallback;
+    ProgressCallback userProgressCallback;
 
     size_t writeCallback(std::vector<uint8_t>& buffer, const uint8_t *data, size_t size);
     bool progressCallback(const DownloadUrl& url, size_t dlnow, size_t dltotal);
@@ -46,9 +46,9 @@ class File
 
 public:
     File(std::list<DownloadUrl>&& urls,
-         success_t successCallback = defaultSuccessFunction,
-         failure_t failureCallback = defaultFailureFunction,
-         progress_t progressCallback = defaultProgressFunction);
+         SuccessCallback successCallback = defaultSuccessFunction,
+         FailureCallback failureCallback = defaultFailureFunction,
+         ProgressCallback progressCallback = defaultProgressFunction);
     File(const File&) = delete;
     File(File&&) = delete;
     File& operator=(const File&) = delete;
diff --git a/thcrap_update/src/http_status.cpp b/thcrap_update/src/http_status.cpp
index dea2134e..48357140 100644
--- a/thcrap_update/src/http_status.cpp
+++ b/thcrap_update/src/http_status.cpp
@@ -12,22 +12,22 @@ HttpStatus::~HttpStatus()
 
 HttpStatus HttpStatus::makeOk()
 {
-    return HttpStatus(Ok, 0, "success");
+    return HttpStatus(Status::Ok, 0, "success");
 }
 
 HttpStatus HttpStatus::makeCancelled()
 {
-    return HttpStatus(Cancelled, 0, "cancelled");
+    return HttpStatus(Status::Cancelled, 0, "cancelled");
 }
 
 HttpStatus HttpStatus::makeNetworkError(unsigned int httpCode)
 {
     HttpStatus::Status status;
     if (300 <= httpCode && httpCode < 499) {
-        status = ClientError;
+        status = Status::ClientError;
     }
     else {
-        status = ServerError;
+        status = Status::ServerError;
     }
 
     std::map<unsigned int, const char*> messages = {
@@ -67,7 +67,7 @@ HttpStatus HttpStatus::makeNetworkError(unsigned int httpCode)
 
 HttpStatus HttpStatus::makeSystemError(unsigned int systemCode, std::string text)
 {
-    return HttpStatus(SystemError, systemCode, text);
+    return HttpStatus(Status::SystemError, systemCode, text);
 }
 
 HttpStatus::Status HttpStatus::get() const
@@ -77,7 +77,7 @@ HttpStatus::Status HttpStatus::get() const
 
 HttpStatus::operator bool() const
 {
-    return this->status == Ok;
+    return this->status == Status::Ok;
 }
 
 bool HttpStatus::operator==(Status status) const
diff --git a/thcrap_update/src/http_status.h b/thcrap_update/src/http_status.h
index 436a73d3..e0d1b8a3 100644
--- a/thcrap_update/src/http_status.h
+++ b/thcrap_update/src/http_status.h
@@ -6,7 +6,7 @@
 class HttpStatus
 {
 public:
-    enum Status {
+    enum class Status {
         // 200 - success
         Ok,
         // Download cancelled by the progress callback, or another client
diff --git a/thcrap_update/src/loader_update.cpp b/thcrap_update/src/loader_update.cpp
index e2a96feb..8a1be926 100644
--- a/thcrap_update/src/loader_update.cpp
+++ b/thcrap_update/src/loader_update.cpp
@@ -677,7 +677,7 @@ BOOL loader_update_with_UI(const char *exe_fn, char *args)
 
 	state.update_at_exit = globalconfig_get_boolean("update_at_exit", false);
 	state.background_updates = globalconfig_get_boolean("background_updates", false);
-	state.time_between_updates = (int)globalconfig_get_integer("time_between_updates", 5);
+	state.time_between_updates = static_cast<int>(globalconfig_get_integer("time_between_updates", 5));
 	state.update_others = globalconfig_get_boolean("update_others", true);
 	
 	SetLastError(0);
diff --git a/thcrap_update/src/self.cpp b/thcrap_update/src/self.cpp
index 591f5adf..2f15ad2b 100644
--- a/thcrap_update/src/self.cpp
+++ b/thcrap_update/src/self.cpp
@@ -81,7 +81,7 @@ LRESULT CALLBACK smartdlg_proc(
 		if (state && state->hProgress) {
 			std::lock_guard<std::mutex> lock(state->progress_mutex);
 			if (state->total_size > 0) {
-				int pos = (int)((state->current_progress * 100) / state->total_size);
+				int pos = static_cast<int>((state->current_progress * 100) / state->total_size);
 				SendMessage(state->hProgress, PBM_SETPOS, pos, 0);
 			}
 		}
diff --git a/thcrap_update/src/server.cpp b/thcrap_update/src/server.cpp
index fd34e2b5..efbb930e 100644
--- a/thcrap_update/src/server.cpp
+++ b/thcrap_update/src/server.cpp
@@ -53,7 +53,7 @@ const std::string& Server::getUrl() const
     return this->baseUrl;
 }
 
-std::pair<std::vector<uint8_t>, HttpStatus> Server::downloadFile(const std::string& name, File::progress_t progress)
+std::pair<std::vector<uint8_t>, HttpStatus> Server::downloadFile(const std::string& name, File::ProgressCallback progress)
 {
     std::list<DownloadUrl> urls{
         DownloadUrl(*this, name)
@@ -75,7 +75,7 @@ std::pair<std::vector<uint8_t>, HttpStatus> Server::downloadFile(const std::stri
     return std::make_pair(std::move(ret), status);
 }
 
-std::pair<ScopedJson, HttpStatus> Server::downloadJsonFile(const std::string& name, File::progress_t progress)
+std::pair<ScopedJson, HttpStatus> Server::downloadJsonFile(const std::string& name, File::ProgressCallback progress)
 {
     auto [data, status] = this->downloadFile(name, progress);
     if (!status) {
@@ -189,13 +189,13 @@ std::pair<Server&, std::string> ServerCache::urlToServer(const std::string& url)
     }
 }
 
-std::pair<std::vector<uint8_t>, HttpStatus> ServerCache::downloadFile(const std::string& url, File::progress_t progress)
+std::pair<std::vector<uint8_t>, HttpStatus> ServerCache::downloadFile(const std::string& url, File::ProgressCallback progress)
 {
     auto [server, path] = this->urlToServer(url);
     return server.downloadFile(path, progress);
 }
 
-std::pair<ScopedJson, HttpStatus> ServerCache::downloadJsonFile(const std::string& url, File::progress_t progress)
+std::pair<ScopedJson, HttpStatus> ServerCache::downloadJsonFile(const std::string& url, File::ProgressCallback progress)
 {
     auto [server, path] = this->urlToServer(url);
     return server.downloadJsonFile(path, progress);
diff --git a/thcrap_update/src/server.h b/thcrap_update/src/server.h
index 2fd4f2ee..4f1281bb 100644
--- a/thcrap_update/src/server.h
+++ b/thcrap_update/src/server.h
@@ -30,7 +30,7 @@ class BorrowedHttpHandle
 class Server
 {
 public:
-    typedef std::function<std::unique_ptr<IHttpHandle>(void)> HttpHandleFactory;
+    using HttpHandleFactory = std::function<std::unique_ptr<IHttpHandle>(void)>;
 
 private:
     HttpHandleFactory handleFactory;
@@ -54,10 +54,10 @@ class Server
     // Download a single file from this server.
     std::pair<std::vector<uint8_t>, HttpStatus> downloadFile(
         const std::string& name,
-        File::progress_t progress = File::defaultProgressFunction
+        File::ProgressCallback progress = File::defaultProgressFunction
     );
     // Download a single json file from this server.
-    std::pair<ScopedJson, HttpStatus> downloadJsonFile(const std::string& name, File::progress_t progress = File::defaultProgressFunction);
+    std::pair<ScopedJson, HttpStatus> downloadJsonFile(const std::string& name, File::ProgressCallback progress = File::defaultProgressFunction);
 
     // Borrow a HttpHandle from the server.
     // You own it until the BorrowedHttpHandle is destroyed.
@@ -102,8 +102,8 @@ class ServerCache
     // Find the server for url and call downloadFile on it
     std::pair<std::vector<uint8_t>, HttpStatus> downloadFile(
         const std::string& url,
-        File::progress_t progress = File::defaultProgressFunction
+        File::ProgressCallback progress = File::defaultProgressFunction
     );
     // Find the server for url and call downloadJsonFile on it
-    std::pair<ScopedJson, HttpStatus> downloadJsonFile(const std::string& url, File::progress_t progress = File::defaultProgressFunction);
+    std::pair<ScopedJson, HttpStatus> downloadJsonFile(const std::string& url, File::ProgressCallback progress = File::defaultProgressFunction);
 };
diff --git a/thcrap_update/src/update.cpp b/thcrap_update/src/update.cpp
index 13122870..dab7efe9 100644
--- a/thcrap_update/src/update.cpp
+++ b/thcrap_update/src/update.cpp
@@ -7,7 +7,7 @@
 #include "strings_array.h"
 #include "3rdparty/crc32.h"
 
-Update::Update(Update::filter_t filterCallback,
+Update::Update(Update::FilterCallback filterCallback,
                progress_callback_t progressCallback, void *progressData)
     : filterCallback(filterCallback), progressCallback(progressCallback), progressData(progressData)
 {
@@ -17,15 +17,15 @@ Update::Update(Update::filter_t filterCallback,
 get_status_t Update::httpStatusToGetStatus(HttpStatus status)
 {
     switch (status.get()) {
-        case HttpStatus::Ok:
+        case HttpStatus::Status::Ok:
             return GET_OK;
-        case HttpStatus::Cancelled:
+        case HttpStatus::Status::Cancelled:
             return GET_CANCELLED;
-        case HttpStatus::ClientError:
+        case HttpStatus::Status::ClientError:
             return GET_CLIENT_ERROR;
-        case HttpStatus::ServerError:
+        case HttpStatus::Status::ServerError:
             return GET_SERVER_ERROR;
-        case HttpStatus::SystemError:
+        case HttpStatus::Status::SystemError:
             return GET_SYSTEM_ERROR;
         default:
             throw std::invalid_argument("Invalid status");
@@ -236,7 +236,7 @@ void Update::startPatchUpdate(const patch_t *patch)
             this->onFilesJsComplete(patch, data);
         },
         [patch_id = std::string(patch->id)](const DownloadUrl& url, HttpStatus httpStatus) {
-            if (httpStatus.get() == HttpStatus::Cancelled) {
+            if (httpStatus.get() == HttpStatus::Status::Cancelled) {
                 // Another file finished before
                 return ;
             }
diff --git a/thcrap_update/src/update.h b/thcrap_update/src/update.h
index 035bbf2a..e71d4e15 100644
--- a/thcrap_update/src/update.h
+++ b/thcrap_update/src/update.h
@@ -96,7 +96,7 @@ void thcrap_update_exit(void);
 class Update
 {
 private:
-    typedef std::function<bool(const std::string&)> filter_t;
+    using FilterCallback = std::function<bool(const std::string&)>;
 
     // Downloader used for the files.js downloads
     Downloader filesJsDownloader;
@@ -106,7 +106,7 @@ class Update
     // files.js is downloaded.
     Downloader mainDownloader;
 
-    filter_t filterCallback;
+    FilterCallback filterCallback;
     progress_callback_t progressCallback;
     void *progressData;
 
@@ -121,7 +121,7 @@ class Update
     std::string fnToUrl(const std::string& url, uint32_t crc32);
 
 public:
-    Update(filter_t filterCallback, progress_callback_t progressCallback, void *progressData);
+    Update(FilterCallback filterCallback, progress_callback_t progressCallback, void *progressData);
     void run(const std::list<const patch_t*>& patchs);
 };
 /// ---------------------------------------