diff --git a/agent/src/index.ts b/agent/src/index.ts
index 9b48767b..d89fc2be 100644
--- a/agent/src/index.ts
+++ b/agent/src/index.ts
@@ -27,9 +27,8 @@ function parseJwtExp(token: string): number | null {
   }
 }
 
-let refreshPromise: Promise<string> | null = null
-
 export const createAuthFetcher = (auth: AgentAuthContext): AuthFetcher => {
+  let refreshPromise: Promise<string> | null = null
   return async (url: string, options?: RequestInit) => {
     if (auth.bearer) {
       const exp = parseJwtExp(auth.bearer)