diff --git a/setup.sh b/setup.sh
index 4609ffc..40a0206 100755
--- a/setup.sh
+++ b/setup.sh
@@ -122,14 +122,40 @@ Uninstall() {
   echo -e "\nUninstall success!\n"
 }
 
+echo "MIT License
+
+Copyright (c) 2019 Yige
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+"
+
 echo "What do you want to do?"
-select var in "Install" "Uninstall" ; do
+select var in "Install (I accept the MIT License.)" "Uninstall" "Exit"; do
   break;
 done
 echo "You have selected $var."
 
-if [[ $var == "Install" ]]; then
+if [[ $var == "Install (I accept the MIT License.)" ]]; then
   Install
-else
+elif [[ $var == "Uninstall" ]]; then
   Uninstall
+else
+  exit 0
 fi