diff --git a/deps/oxlib/src/std/include/ox/std/strops.hpp b/deps/oxlib/src/std/include/ox/std/strops.hpp
index 33e2351a..9f943782 100644
--- a/deps/oxlib/src/std/include/ox/std/strops.hpp
+++ b/deps/oxlib/src/std/include/ox/std/strops.hpp
@@ -38,7 +38,7 @@ constexpr StringView substr(StringViewCR str, std::size_t const start, std::size
 
 [[nodiscard]]
 constexpr char toUpper(char const c) noexcept {
-	return c & 0b1101'1111;
+	return c & static_cast<char>(0b1101'1111);
 }
 
 [[nodiscard]]