diff --git a/install.sh b/install.sh
index 8ca062e..7a40242 100755
--- a/install.sh
+++ b/install.sh
@@ -51,6 +51,13 @@ function execute_miaou_lib {
   sudo -E "$MIAOU_BASH_DIR"/bin/miaou-bash "$MIAOU_BASH_DIR"/lib/"$1".bash
 }
 
+function assert_bash {
+  if [[ $SHELL != bash ]]; then
+    >&2 echo "you are running on SHELL=$SHELL. Bash expected!"
+    exit 98
+  fi
+}
+
 function sudo_root {
   [[ "$UID" -ne 0 ]] && sudo -vp 'SUDO privilege required: '
   true
@@ -59,6 +66,7 @@ function sudo_root {
 
 set -Eeuo pipefail
 assert_supported_distro
+assert_bash
 sudo_root
 
 if [[ ! -v MIAOU_BASH_DIR ]]; then