diff --git a/install_auto.sh b/install_auto.sh
index 3903d0d..4e2bbc9 100755
--- a/install_auto.sh
+++ b/install_auto.sh
@@ -27,5 +27,6 @@ if [ ! -e /etc/proxy/proxy.crt ]; then
     cd /etc/proxy/
     proxy keygen >/dev/null 2>&1 
 fi
+rm -rf /tmp/proxy
 echo "install done"
 proxyd