diff --git a/sshagent/trezor.py b/sshagent/trezor.py
index abe1e87..3894404 100644
--- a/sshagent/trezor.py
+++ b/sshagent/trezor.py
@@ -48,6 +48,7 @@ class Client(object):
 
     def __exit__(self, *args):
         log.info('disconnected from Trezor')
+        self.client.clear_session()
         self.client.close()
 
     def get_public_key(self, label):