diff --git a/install.sh b/install.sh
index 3996a49..8d5518b 100755
--- a/install.sh
+++ b/install.sh
@@ -32,9 +32,9 @@ function bootstrap {
 
 [[ "$UID" -ne 0 ]] && echo 'root privilege required' && exit 1
 if [[ -v MIAOU_BASH_DIR ]]; then
-  . bin/miaou-bash "$MIAOU_BASH_DIR/lib/self-upgrade.bash"
+  miaou-bash "$MIAOU_BASH_DIR/lib/self-upgrade.bash"
 else
   bootstrap
-  . bin/miaou-bash "$MIAOU_BASH_DIR/lib/init.bash"
+  miaou-bash "$MIAOU_BASH_DIR/lib/init.bash"
   echo "miaou-bash successfully installed"
 fi