diff --git a/src/telebot/private/utils.nim b/src/telebot/private/utils.nim
index 76d115c..be88098 100644
--- a/src/telebot/private/utils.nim
+++ b/src/telebot/private/utils.nim
@@ -95,7 +95,7 @@ proc unmarshal*(n: JsonNode, T: typedesc): T {.gcsafe.} =
   when T is TelegramObject:
     for name, value in result.fieldPairs:
       when not value.hasCustomPragma(telebotInternalUse):
-        let jsonKey = formatName(name)
+        let jsonKey = static(formatName(name))
         if n.hasKey(jsonKey):
           value = unmarshal(n[jsonKey], value.type)
   elif result is ref:
@@ -128,7 +128,7 @@ proc marshal*[T](t: T, s: var string) {.inline.} =
     s.add "{"
     for name, value in t.fieldPairs:
       when not value.hasCustomPragma(telebotInternalUse):
-        let jsonKey = formatName(name)
+        let jsonKey = static(formatName(name))
         if value.isSet:
           s.add("\"" & jsonKey & "\":")
           marshal(value, s)
diff --git a/telebot.nimble b/telebot.nimble
index a1e168f..f65048f 100644
--- a/telebot.nimble
+++ b/telebot.nimble
@@ -1,4 +1,4 @@
-version       = "2024.09.10"
+version       = "2024.12.17"
 author        = "Huy Doan"
 description   = "Async Telegram Bot API Client"
 license       = "MIT"