diff --git a/js/api/anthropic.js b/js/api/anthropic.js
index b8c5f844..dcf438c5 100644
--- a/js/api/anthropic.js
+++ b/js/api/anthropic.js
@@ -93,7 +93,7 @@ export class Anthropic {
 
       let claude_body = { 
               model: this.model,
-              max_tokens: this.max_tokens,
+              max_tokens: parseInt(this.max_tokens),
               system: this.system_prompt,
               messages: messages,
               stream: this.stream,