diff --git a/src/content_type.h b/src/content_type.h
index 8b341c6..fa213c1 100644
--- a/src/content_type.h
+++ b/src/content_type.h
@@ -9,7 +9,21 @@ using namespace std;
 struct content_type
 {
   content_type() = delete;
-  constexpr inline static std::string_view k_TextHTML = "text/html"sv;
+  constexpr inline static std::string_view k_TextHtml = "text/html"sv;
+  constexpr inline static std::string_view k_TextCsv = "text/csv"sv;
+  constexpr inline static std::string_view k_TextPlain = "text/plain"sv;
   constexpr inline static std::string_view k_JSON = "application/json"sv;
+  constexpr inline static std::string_view k_Audio = "audio/mpeg"sv;
+  constexpr inline static std::string_view k_AudioExample = "audio/example"sv;
+  constexpr inline static std::string_view k_FontWoff = "font/woff"sv;
+  constexpr inline static std::string_view k_FontTtf = "font/ttf"sv;
+  constexpr inline static std::string_view k_FontOtf = "font/otf"sv;
+  constexpr inline static std::string_view k_ImagePng = "image/png"sv;
+  constexpr inline static std::string_view k_ImageJpeg = "image/jpeg"sv;
+  constexpr inline static std::string_view k_ImageGif = "image/gif"sv;
+  constexpr inline static std::string_view k_Model = "model/vrml"sv;
+  constexpr inline static std::string_view k_VideoMp4 = "video/mp4"sv;
+  constexpr inline static std::string_view k_VideoWebm = "video/webm"sv;
+  constexpr inline static std::string_view k_Binary = "application/octet-stream"sv;
 };
 }