diff --git a/libs/langchain-community/src/callbacks/handlers/upstash_ratelimit.ts b/libs/langchain-community/src/callbacks/handlers/upstash_ratelimit.ts
index 255c474adbd0..d09a90cb17a2 100644
--- a/libs/langchain-community/src/callbacks/handlers/upstash_ratelimit.ts
+++ b/libs/langchain-community/src/callbacks/handlers/upstash_ratelimit.ts
@@ -100,6 +100,8 @@ class UpstashRatelimitHandler extends BaseCallbackHandler {
       options.llmOutputTotalTokenField ?? "totalTokens";
     this.llmOutputPromptTokenField =
       options.llmOutputPromptTokenField ?? "promptTokens";
+
+    this.awaitHandlers = true;
   }
 
   /**