diff --git a/library/include/larra/stream_error.hpp b/library/include/larra/stream_error.hpp
index ca908aa..648b2a4 100644
--- a/library/include/larra/stream_error.hpp
+++ b/library/include/larra/stream_error.hpp
@@ -2,43 +2,10 @@
 #include <libxml++/libxml++.h>
 
 #include <larra/utils.hpp>
-#include <nameof.hpp>
-#include <ranges>
 #include <variant>
 
 namespace larra::xmpp {
 
-namespace impl {
-// std::isupper not declared as constexpr
-constexpr auto IsUpper(char ch) -> bool {
-  return ch >= 'A' && ch <= 'Z';
-}
-
-constexpr auto ToLower(char ch) -> char {
-  return (ch >= 'A' && ch <= 'Z') ? static_cast<char>(ch + ('a' - 'A')) : ch;
-}
-
-template <typename T>
-constexpr auto ToKebabCaseName() -> std::string_view {
-  static constexpr auto rawStr = nameof::nameof_short_type<T>();
-
-  constexpr auto str = [] {
-    return rawStr  //
-           | std::views::transform([](auto ch) {
-               return impl::IsUpper(ch) ? std::array<char, 2>{'-', impl::ToLower(ch)} : std::array<char, 2>{ch, '\0'};
-             })                //
-           | std::views::join  //
-           | std::views::filter([](char ch) {
-               return ch != '\0';
-             })  //
-           | std::views::drop(1);
-  };
-  static constexpr auto arr = str() | std::ranges::to<utils::RangeToWrapper<std::array<char, std::ranges::distance(str())>>>();
-  return {arr.data(), arr.size()};
-}
-
-}  // namespace impl
-
 namespace error::stream {
 
 struct BaseError : std::exception {};
@@ -48,7 +15,7 @@ struct BaseError : std::exception {};
 template <typename T>
 struct ErrorImpl : BaseError {
   static constexpr auto kDefaultName = "stream:error";
-  static inline const auto kKebabCaseName = static_cast<std::string>(impl::ToKebabCaseName<T>());
+  static inline const auto kKebabCaseName = static_cast<std::string>(utils::ToKebabCaseName<T>());
 
   static constexpr auto kErrorMessage = [] -> std::string_view {
     static constexpr auto name = nameof::nameof_short_type<T>();
diff --git a/library/include/larra/utils.hpp b/library/include/larra/utils.hpp
index 7534947..4628754 100644
--- a/library/include/larra/utils.hpp
+++ b/library/include/larra/utils.hpp
@@ -1,5 +1,7 @@
 #pragma once
 #include <boost/pfr.hpp>
+#include <nameof.hpp>
+#include <ranges>
 #include <utempl/utils.hpp>
 
 namespace larra::xmpp::utils {
@@ -309,4 +311,31 @@ auto AccumulateFieldLength(const T& obj) -> std::size_t {
   return totalLength;
 }
 
+template <typename T>
+constexpr auto ToKebabCaseName() -> std::string_view {
+  static constexpr auto rawStr = nameof::nameof_short_type<T>();
+
+  // std::isupper and std::tolower are not declared as constexpr
+  static constexpr auto isUpper = [](char ch) {
+    return ch >= 'A' && ch <= 'Z';
+  };
+  static constexpr auto toLower = [](char ch) {
+    return (ch >= 'A' && ch <= 'Z') ? static_cast<char>(ch + ('a' - 'A')) : ch;
+  };
+
+  constexpr auto str = [] {
+    return rawStr  //
+           | std::views::transform([](auto ch) {
+               return isUpper(ch) ? std::array<char, 2>{'-', toLower(ch)} : std::array<char, 2>{ch, '\0'};
+             })                //
+           | std::views::join  //
+           | std::views::filter([](char ch) {
+               return ch != '\0';
+             })  //
+           | std::views::drop(1);
+  };
+  static constexpr auto arr = str() | std::ranges::to<utils::RangeToWrapper<std::array<char, std::ranges::distance(str())>>>();
+  return {arr.data(), arr.size()};
+}
+
 }  // namespace larra::xmpp::utils