diff --git a/install/install.py b/install/install.py
index 5d354761b..01b281a92 100755
--- a/install/install.py
+++ b/install/install.py
@@ -237,6 +237,7 @@ class PreSetup(object):
 
     def _require_pip(self):
         color_print('开始安装依赖pip包', 'green')
+        bash('pip uninstall -y pycrypto')
         ret_code = bash('pip install -r requirements.txt')
         self.check_bash_return(ret_code, "安装JumpServer 依赖的python库失败！")
 
diff --git a/install/requirements.txt b/install/requirements.txt
index 58d243c3a..764fc47f4 100644
--- a/install/requirements.txt
+++ b/install/requirements.txt
@@ -1,6 +1,6 @@
 #sphinx-me==0.3
 django==1.6
-pycrypto==2.6.1
+pycrypto==2.4.1
 paramiko==1.16.0
 ecdsa==0.13
 MySQL-python==1.2.5