diff --git a/packages/nonebot-adapter-mirai/nonebot/adapters/mirai/bot.py b/packages/nonebot-adapter-mirai/nonebot/adapters/mirai/bot.py
index ebce2d74..a967025c 100644
--- a/packages/nonebot-adapter-mirai/nonebot/adapters/mirai/bot.py
+++ b/packages/nonebot-adapter-mirai/nonebot/adapters/mirai/bot.py
@@ -95,6 +95,7 @@ class SessionManager:
         """
         files = {k: v for k, v in params.items() if isinstance(v, BytesIO)}
         form = {k: v for k, v in params.items() if k not in files}
+        form['sessionKey'] = self.session_key
         response = await self.client.post(
             path,
             data=form,