diff --git a/lib/self-upgrade.bash b/lib/self-upgrade.bash
index b151604..896410b 100644
--- a/lib/self-upgrade.bash
+++ b/lib/self-upgrade.bash
@@ -25,7 +25,7 @@ source "$MIAOU_BASH_DIR"/lib/functions.bash
 sudo_root
 assert_system_mode
 
-current=$(miaou-bash --version)
+current=$("$MIAOU_BASH_DIR"/bin/miaou-bash --version)
 latest=$("$MIAOU_BASH_DIR"/tools/wget_semver artcode miaou/miaou-bash)
 if [[ "$current" == "$latest" ]]; then
   echo "up-to-date version: $current"