diff --git a/include/misc/Format.h b/include/misc/Format.h
index 4c23dc9..4cc7198 100644
--- a/include/misc/Format.h
+++ b/include/misc/Format.h
@@ -14,7 +14,7 @@ std::string format(const std::string& format, Args... args){
 		throw std::runtime_error("Error during formatting.");
 	}
 	std::unique_ptr<char[]> buf(new char[size]);
-	snprintf(buf.get(), size, format.c_str(), args...);
+	snprintf(buf.get(), static_cast<std::size_t>(size), format.c_str(), args...);
 	return std::string(buf.get(), buf.get() + size - 1); // We don't want the '\0' inside
 }
 
diff --git a/xmake.lua b/xmake.lua
index 0fc95c2..f9cd23b 100644
--- a/xmake.lua
+++ b/xmake.lua
@@ -37,7 +37,7 @@ target("TowerDefense")
         if is_os("windows") then
             add_links("dbghelp", "psapi", "kernel32", "msvcr90")
         end
-        add_cxflags("-pedantic -Wall -Wextra -Wcast-align -Wcast-qual -Wctor-dtor-privacy -Wdisabled-optimization -Wformat=2 -Winit-self -Wlogical-op -Wmissing-declarations -Wmissing-include-dirs -Wnoexcept -Wold-style-cast -Wredundant-decls -Wshadow -Wsign-conversion -Wsign-promo -Wstrict-null-sentinel -Wstrict-overflow=5 -Wswitch-default -Wundef -Wno-unused")
+        add_cxflags("-pedantic -Wall -Wextra -Wcast-align -Wcast-qual -Wctor-dtor-privacy -Wdisabled-optimization -Wformat=1 -Winit-self -Wlogical-op -Wmissing-declarations -Wmissing-include-dirs -Wnoexcept -Wold-style-cast -Wredundant-decls -Wshadow -Wsign-conversion -Wsign-promo -Wstrict-null-sentinel -Wstrict-overflow=5 -Wswitch-default -Wundef -Wno-unused")
     end