diff --git a/run_onchange_before_23_tpm.sh b/run_onchange_before_23_tpm.sh
index 789961c..2044c7b 100644
--- a/run_onchange_before_23_tpm.sh
+++ b/run_onchange_before_23_tpm.sh
@@ -1,5 +1,6 @@
-#!/usr/bin/env sh
+#!/usr/bin/env bash
 
 # Install TPM
-[[ ! -d ~/.tmux/plugins/tpm ]] && git clone https://github.com/tmux-plugins/tpm ~/.tmux/plugins/tpm
-
+if [[ ! -d ~/.tmux/plugins/tpm ]]; then
+    git clone https://github.com/tmux-plugins/tpm ~/.tmux/plugins/tpm
+fi