diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index bc3fb2b..1862ee3 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -15,9 +15,9 @@ set_target_properties(tmx2gba PROPERTIES
 
 # Enable strong warnings
 target_compile_options(tmx2gba PRIVATE
-	$<$<CXX_COMPILER_ID:MSVC>:/Wall>
+	$<$<CXX_COMPILER_ID:MSVC>:/Wall>
 	$<$<CXX_COMPILER_ID:GNU,Clang,AppleClang>:-Wall -Wextra -pedantic>
-	$<$<CXX_COMPILER_ID:Clang,AppleClang>:-Weverything>)
+	$<$<CXX_COMPILER_ID:Clang,AppleClang>:-Weverything -Wno-c++98-compat>)
 
 target_link_libraries(tmx2gba
 	External::base64
diff --git a/src/argparse.cpp b/src/argparse.cpp
index dcf53f8..faafa7c 100644
--- a/src/argparse.cpp
+++ b/src/argparse.cpp
@@ -151,8 +151,6 @@ bool ArgParse::ArgParser::CheckParse(ArgParse::ParseErr err) const
 	case ParseErr::ARG_RANGE:
 		DisplayError("Argument out of range.", false);
 		return false;
-	default:
-		return false;
 	}
 }
 
diff --git a/src/argparse.hpp b/src/argparse.hpp
index 16d078d..61dbaf4 100644
--- a/src/argparse.hpp
+++ b/src/argparse.hpp
@@ -16,18 +16,18 @@ namespace ArgParse
 {
 	struct Option
 	{
-		char flag;
-		bool required;
 		const char* argumentName;
 		const char* helpString;
+		char flag;
+		bool required;
 
 		static constexpr Option Optional(char flag, const char* name, const char* help)
 		{
-			return { flag, false, name, help };
+			return { name, help, flag, false };
 		}
 		static constexpr Option Required(char flag, const char* name, const char* help)
 		{
-			return { flag, true, name, help };
+			return { name, help, flag, false };
 		}
 	};
 
@@ -66,10 +66,10 @@ namespace ArgParse
 
 	class ParserState
 	{
-		bool expectArg = false;
-		int flagChar;
 		HandleOption handler;
 		const Options& options;
+		int flagChar;
+		bool expectArg = false;
 
 	public:
 		ParserState(HandleOption handler, const Options& options) noexcept
diff --git a/src/swriter.hpp b/src/swriter.hpp
index f807cb2..186d169 100644
--- a/src/swriter.hpp
+++ b/src/swriter.hpp
@@ -37,7 +37,7 @@ class SWriter
 			if (col == 0)
 				aOut << "\t" << GccIsDumb::DatType<T>() << " ";
 
-			aOut << std::hex << (int)element;
+			aOut << std::hex << static_cast<int>(element);
 
 			if (i < aDat.size() - 1)
 			{
diff --git a/src/tmx2gba.cpp b/src/tmx2gba.cpp
index 64dbc18..e82ed4e 100644
--- a/src/tmx2gba.cpp
+++ b/src/tmx2gba.cpp
@@ -11,7 +11,7 @@
 #include <algorithm>
 
 
-const std::string versionStr = "tmx2gba version 0.3, (c) 2015-2022 a dinosaur";
+static const char* versionStr = "tmx2gba version 0.3, (c) 2015-2022 a dinosaur";
 
 struct Arguments
 {
@@ -195,7 +195,9 @@ int main(int argc, char** argv)
 
 	// Get name from file
 	//TODO: properly sanitise
-	int slashPos = std::max((int)p.outPath.find_last_of('/'), (int)p.outPath.find_last_of('\\'));
+	int slashPos = std::max(
+		static_cast<int>(p.outPath.find_last_of('/')),
+		static_cast<int>(p.outPath.find_last_of('\\')));
 	std::string name = p.outPath;
 	if (slashPos != -1)
 		name = name.substr(slashPos + 1);
@@ -223,7 +225,7 @@ int main(int argc, char** argv)
 	{
 		uint32_t read = (*gfxTiles++);
 
-		uint16_t tile = (uint16_t)std::max<int32_t>(0, tmx.LidFromGid(read & ~TmxLayer::FLIP_MASK) + p.offset);
+		uint16_t tile = std::max<uint16_t>(0, tmx.LidFromGid(read & ~TmxLayer::FLIP_MASK) + p.offset);
 		uint8_t flags = 0x0;
 
 		// Get flipped!
@@ -255,7 +257,7 @@ int main(int argc, char** argv)
 		gfxTiles = layerCls->GetData();
 		for (int i = 0; i < layerCls->GetWidth() * layerCls->GetHeight(); ++i)
 		{
-			uint8_t ucTile = (uint8_t)tmx.LidFromGid((*gfxTiles++) & ~TmxLayer::FLIP_MASK);
+			uint8_t ucTile = static_cast<uint8_t>(tmx.LidFromGid((*gfxTiles++) & ~TmxLayer::FLIP_MASK));
 			collisionDat.push_back(ucTile);
 		}
 
@@ -285,8 +287,8 @@ int main(int argc, char** argv)
 			float x, y;
 			obj->GetPos(x, y);
 			objDat.push_back(it->second);
-			objDat.push_back((int)(x * 256.0f));
-			objDat.push_back((int)(y * 256.0f));
+			objDat.push_back(static_cast<int>(x * 256.0f));
+			objDat.push_back(static_cast<int>(y * 256.0f));
 		}
 
 		// Write objects
diff --git a/src/tmxreader.cpp b/src/tmxreader.cpp
index 59e6ca5..f860a62 100644
--- a/src/tmxreader.cpp
+++ b/src/tmxreader.cpp
@@ -43,7 +43,7 @@ bool TmxReader::DecodeMap(uint32_t* aOut, size_t aOutSize, const std::string& aB
 	// Decompress compressed data
 	auto dstSize = static_cast<mz_ulong>(aOutSize);
 	int res = uncompress(
-		(unsigned char*)aOut,
+		reinterpret_cast<unsigned char*>(aOut),
 		&dstSize,
 		reinterpret_cast<const unsigned char*>(decoded.data()),
 		static_cast<mz_ulong>(decoded.size()));
@@ -172,7 +172,7 @@ void TmxReader::Open(std::istream& aIn)
 
 	// Parse document
 	rapidxml::xml_document<> xDoc;
-	xDoc.parse<0>((char*)strXml.c_str());
+	xDoc.parse<0>(const_cast<char*>(strXml.c_str()));
 
 	// Get map node
 	auto xMap = xDoc.first_node("map");
diff --git a/src/tmxtileset.hpp b/src/tmxtileset.hpp
index 4dbeb6c..bfa9817 100644
--- a/src/tmxtileset.hpp
+++ b/src/tmxtileset.hpp
@@ -23,7 +23,6 @@ class TmxTileset
 	std::string mName;
 	std::string mSource;
 	uint32_t mFirstGid;
-
 };
 
 #endif//TMXTILESET_HPP