diff --git a/hledger-install/hledger-install.sh b/hledger-install/hledger-install.sh
index 5633f3404..4d328bf57 100755
--- a/hledger-install/hledger-install.sh
+++ b/hledger-install/hledger-install.sh
@@ -1,4 +1,4 @@
-#!/bin/sh -e
+#!/bin/bash -e
 
 usage() {
   cat <<'HERE'