diff --git a/inc/Logger.h b/inc/Logger.h
index c4e2d4f..39d357e 100644
--- a/inc/Logger.h
+++ b/inc/Logger.h
@@ -6,8 +6,8 @@
 #include <iostream>
 #include <tuple>
 
-#include <utility.h>
 #include <parsing.h>
+#include <utility.h>
 
 
 /*
@@ -17,18 +17,24 @@
  */
 
 
+namespace detail {
+
 template <typename T>
 concept output_policy_c = requires(T t) {
     t.write('c');
 };
 
+} // namespace detail
 
-template <output_policy_c output_policy_t>
+
+template <detail::output_policy_c output_policy_t>
 class Logger {
-public:
-    Logger(output_policy_t output_policy) : m_output_policy(output_policy) {}
 
-    template<ConstString msg, typename... args_t>
+public:
+    Logger(output_policy_t output_policy) : m_output_policy(output_policy) {
+    }
+
+    template <detail::ConstString msg, typename... args_t>
     void log(args_t...) {
         constexpr int len = get_output_len(msg);
         static_assert(len > 0, "Syntax error in log string");
diff --git a/inc/parsing.h b/inc/parsing.h
index 94e26b2..3111ba2 100644
--- a/inc/parsing.h
+++ b/inc/parsing.h
@@ -1,11 +1,13 @@
-//
-// Created by andreas on 11/18/21.
-//
-
 #ifndef LOGGER_PARSING_H
 #define LOGGER_PARSING_H
 
 
+#include <utility.h>
+
+
+namespace detail {
+
+
 // clang-format off
 
 /*
@@ -38,12 +40,12 @@
 // clang-format on
 
 
-template<std::size_t N>
+template <std::size_t N>
 constexpr bool is_digit(ConstString<N> s, unsigned i) {
     return (s[i] > 47) && (s[i] < 58);
 }
 
-template<std::size_t N>
+template <std::size_t N>
 constexpr std::pair<unsigned, int> parse_number(ConstString<N> s, unsigned i) {
     while ((i < s.size()) && is_digit(s, i)) {
         ++i;
@@ -52,7 +54,7 @@ constexpr std::pair<unsigned, int> parse_number(ConstString<N> s, unsigned i) {
     return {i, 0};
 }
 
-template<std::size_t N>
+template <std::size_t N>
 constexpr std::pair<unsigned, int> parse_type(ConstString<N> s, unsigned i) {
     if (s[i] == 's') { // string
         ++i;
@@ -113,8 +115,9 @@ constexpr std::pair<unsigned, int> parse_type(ConstString<N> s, unsigned i) {
     return {i, -1};
 }
 
-template<std::size_t N>
-constexpr std::pair<unsigned, int> parse_fmt_string(ConstString<N> s, unsigned i) {
+template <std::size_t N>
+constexpr std::pair<unsigned, int> parse_fmt_string(ConstString<N> s,
+                                                    unsigned       i) {
     int result_extra_len = 0;
 
     if (s[i] == '0')
@@ -143,13 +146,12 @@ constexpr std::pair<unsigned, int> parse_fmt_string(ConstString<N> s, unsigned i
             return {i, -1};
         i = new_i;
         result_extra_len += extra_len;
-
     }
 
     return {i, result_extra_len};
 }
 
-template<std::size_t N>
+template <std::size_t N>
 constexpr std::pair<unsigned, int> parse_braces(ConstString<N> s, unsigned i) {
     int result_extra_len = 0;
 
@@ -174,7 +176,7 @@ constexpr std::pair<unsigned, int> parse_braces(ConstString<N> s, unsigned i) {
     return {i, -1};
 }
 
-template<std::size_t N>
+template <std::size_t N>
 constexpr int get_output_len(ConstString<N> s) {
     int result_extra_len = 0;
 
@@ -197,4 +199,7 @@ constexpr int get_output_len(ConstString<N> s) {
 }
 
 
-#endif //LOGGER_PARSING_H
+} // namespace detail
+
+
+#endif // LOGGER_PARSING_H
diff --git a/inc/utility.h b/inc/utility.h
index f22ee41..fe6dad0 100644
--- a/inc/utility.h
+++ b/inc/utility.h
@@ -2,6 +2,9 @@
 #define LOGGER_UTILITY_H
 
 
+namespace detail {
+
+
 template <std::size_t N>
 class ConstString {
 public:
@@ -15,14 +18,18 @@ public:
     }
 
     constexpr std::size_t size() const noexcept {
-        return N-1;
+        return N - 1;
     }
 
     std::array<char, N> m_content;
 };
 
+
 template <std::size_t N>
 ConstString(const char (&)[N]) -> ConstString<N>;
 
 
-#endif //LOGGER_UTILITY_H
+} // namespace detail
+
+
+#endif // LOGGER_UTILITY_H
diff --git a/src/main.cpp b/src/main.cpp
index 2753e93..fec0435 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -16,7 +16,7 @@ int main() {
     Uart uart;
 
     Logger logger(uart);
-    logger.log<"Test format string: {} {}">(1, 2, 3);
+    logger.log<"Test format string: {:08.4f} {}">(1, 2, 3);
 
     return 0;
 }
\ No newline at end of file