diff --git a/install/dependency.sh b/install/dependency.sh
index 96db4331..730bfdd5 100755
--- a/install/dependency.sh
+++ b/install/dependency.sh
@@ -30,6 +30,7 @@ fi
 sudo pip install --upgrade setuptools
 sudo pip install --upgrade virtualenv
 sudo easy_install --upgrade pip
+sudo pip install --upgrade pip
 if [[ "$?" != "0" ]]; then
     echo "failed to install easy install"
     exit 1