diff --git a/lib/self-upgrade.bash b/lib/self-upgrade.bash
index ade2c61..1913ace 100644
--- a/lib/self-upgrade.bash
+++ b/lib/self-upgrade.bash
@@ -28,6 +28,8 @@ function development_upgrade {
   fi
   if sudo_root; then
     sudo miaou-bash "$MIAOU_BASH_DIR"/lib/initiate.bash
+  else
+    builtin exit 1
   fi
 }
 
@@ -39,6 +41,8 @@ function system_upgrade {
     echo "up-to-date version: $current (Ctrl-c to bypass reinitialization)"
     if sudo_root; then
       sudo miaou-bash "$MIAOU_BASH_DIR"/lib/initiate.bash
+    else
+      builtin exit 1
     fi
   else
     echo "new version available: $latest"