diff --git a/src/api/api.ts b/src/api/api.ts
index 4713496..0989207 100644
--- a/src/api/api.ts
+++ b/src/api/api.ts
@@ -22,7 +22,7 @@ export const getChatCompletion = async (
     body: JSON.stringify({
       messages,
       ...config,
-      max_tokens: null,
+      max_tokens: undefined,
     }),
   });
   if (!response.ok) throw new Error(await response.text());
@@ -51,7 +51,7 @@ export const getChatCompletionStream = async (
     body: JSON.stringify({
       messages,
       ...config,
-      max_tokens: null,
+      max_tokens: undefined,
       stream: true,
     }),
   });