diff --git a/src/ThreadsConfig.ts b/src/ThreadsConfig.ts
index 0143aaf1d..7570561ae 100644
--- a/src/ThreadsConfig.ts
+++ b/src/ThreadsConfig.ts
@@ -21,7 +21,11 @@ export class ThreadsConfig extends Config {
     super()
     this.host = `${this.apiScheme}://${this.api}:${this.threadsPort}`
   }
-  async start() {
+  async start(sessionId?: string) {
+    if (sessionId !== undefined) {
+      this.session = sessionId
+      return
+    }
     await this.refreshSession()
   }
   get sessionAPI(): string {
diff --git a/src/index.ts b/src/index.ts
index 6d41118c6..72333aed5 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -50,8 +50,8 @@ export class API {
         )
   }
 
-  async start() {
-    await this._threadsConfig.start()
+  async start(sessionId?: string) {
+    await this._threadsConfig.start(sessionId)
     return this
   }