diff --git a/src/OfficialAccount/AccessToken.php b/src/OfficialAccount/AccessToken.php
index 5fcf1772a..50d8693c6 100644
--- a/src/OfficialAccount/AccessToken.php
+++ b/src/OfficialAccount/AccessToken.php
@@ -46,7 +46,7 @@ public function __construct(
 
     public function getKey(): string
     {
-        return $this->key ?? $this->key = sprintf('%s.access_token.%s.%s', static::CACHE_KEY_PREFIX, $this->appId, $this->secret);
+        return $this->key ?? $this->key = sprintf('%s.access_token.%s.%s.%s', static::CACHE_KEY_PREFIX, $this->appId, $this->secret, (int)$this->stable);
     }
 
     public function setKey(string $key): static
@@ -132,7 +132,7 @@ public function getStableAccessToken(bool $force_refresh = false): string
         )->toArray(false);
 
         if (empty($response['access_token'])) {
-            throw new HttpException('Failed to get stable access_token: '.json_encode($response, JSON_UNESCAPED_UNICODE));
+            throw new HttpException('Failed to get stable access_token: ' . json_encode($response, JSON_UNESCAPED_UNICODE));
         }
 
         $this->cache->set($this->getKey(), $response['access_token'], intval($response['expires_in']));
@@ -164,7 +164,7 @@ public function getAccessToken(): string
         )->toArray(false);
 
         if (empty($response['access_token'])) {
-            throw new HttpException('Failed to get access_token: '.json_encode($response, JSON_UNESCAPED_UNICODE));
+            throw new HttpException('Failed to get access_token: ' . json_encode($response, JSON_UNESCAPED_UNICODE));
         }
 
         $this->cache->set($this->getKey(), $response['access_token'], intval($response['expires_in']));