diff --git a/library/think/session/driver/Memcache.php b/library/think/session/driver/Memcache.php
index dbc5054e..869d9d2c 100644
--- a/library/think/session/driver/Memcache.php
+++ b/library/think/session/driver/Memcache.php
@@ -12,6 +12,7 @@
 namespace think\session\driver;
 
 use SessionHandler;
+use think\Exception;
 
 class Memcache extends SessionHandler
 {
diff --git a/library/think/session/driver/Redis.php b/library/think/session/driver/Redis.php
index b3e2121d..43954629 100644
--- a/library/think/session/driver/Redis.php
+++ b/library/think/session/driver/Redis.php
@@ -11,8 +11,8 @@
 
 namespace think\session\driver;
 
-use think\Config;
 use SessionHandler;
+use think\Exception;
 
 class Redis extends SessionHandler
 {