diff --git a/deps/ox/src/ox/std/assert.hpp b/deps/ox/src/ox/std/assert.hpp
index f15e63a4..95df779b 100644
--- a/deps/ox/src/ox/std/assert.hpp
+++ b/deps/ox/src/ox/std/assert.hpp
@@ -8,6 +8,12 @@
 
 #pragma once
 
+#if __has_include(<cassert>)
+#include <cassert>
+#else
+#define	assert(e) {}
+#endif
+
 #include "defines.hpp"
 #include "error.hpp"
 
diff --git a/deps/ox/src/ox/std/bstring.hpp b/deps/ox/src/ox/std/bstring.hpp
index bc64976c..bb235e4c 100644
--- a/deps/ox/src/ox/std/bstring.hpp
+++ b/deps/ox/src/ox/std/bstring.hpp
@@ -45,7 +45,7 @@ class BString {
 
 		constexpr char &operator[](std::size_t i) noexcept;
 
-		Error append(const char *str, std::size_t strLen) noexcept;
+		constexpr Error append(const char *str, std::size_t strLen) noexcept;
 
 		constexpr char *data() noexcept;
 
@@ -153,14 +153,14 @@ constexpr char &BString<buffLen>::operator[](std::size_t i) noexcept {
 }
 
 template<std::size_t buffLen>
-Error BString<buffLen>::append(const char *str, std::size_t strLen) noexcept {
+constexpr Error BString<buffLen>::append(const char *str, std::size_t strLen) noexcept {
 	Error err;
 	auto currentLen = len();
 	if (cap() < currentLen + strLen + 1) {
 		strLen = cap() - currentLen;
 		err = OxError(1, "Insufficient space for full string");
 	}
-	ox_memcpy(m_buff + currentLen, str, strLen);
+	ox_strncpy(m_buff + currentLen, str, strLen);
 	// make sure last element is a null terminator
 	m_buff[currentLen + strLen] = 0;
 	return err;
diff --git a/deps/ox/src/ox/std/fmt.hpp b/deps/ox/src/ox/std/fmt.hpp
index 81477eaa..7edff4fc 100644
--- a/deps/ox/src/ox/std/fmt.hpp
+++ b/deps/ox/src/ox/std/fmt.hpp
@@ -169,8 +169,8 @@ constexpr Fmt<segementCnt> fmtSegments(const char *fmt) noexcept {
 
 template<typename StringType = String, typename ...Args>
 [[nodiscard]]
-StringType sfmt(const char *fmt, Args... args) noexcept {
-	oxAssert(ox::detail::argCount(fmt) == sizeof...(args), "Argument count mismatch.");
+constexpr StringType sfmt(const char *fmt, Args... args) noexcept {
+	assert(ox::detail::argCount(fmt) == sizeof...(args));
 	StringType out;
 	const auto fmtSegments = ox::detail::fmtSegments<sizeof...(args)+1>(fmt);
 	const auto &firstSegment = fmtSegments.segments[0];