diff --git a/install.sh b/install.sh
index 90db97e..d04ed2a 100644
--- a/install.sh
+++ b/install.sh
@@ -1,9 +1,9 @@
-#!/bin/sh
+#!/usr/bin/env sh
 
 [ -d /var/hdd.log ] && echo "ERROR: log2ram still installed. Uninstall first!"
 [ -d /var/hdd.log ] && exit 1
 
-if [ $(id -u) -eq 0 ]
+if [ "$(id -u)" -eq 0 ]
 then
   cp log2ram.service /etc/systemd/system/log2ram.service
   chmod 644 /etc/systemd/system/log2ram.service
diff --git a/log2ram b/log2ram
index 6c2fd6c..127a703 100755
--- a/log2ram
+++ b/log2ram
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env sh
 
 . /etc/log2ram.conf
 
diff --git a/log2ram.hourly b/log2ram.hourly
index d7da285..3c266c1 100644
--- a/log2ram.hourly
+++ b/log2ram.hourly
@@ -1,3 +1,3 @@
-#!/bin/sh
+#!/usr/bin/env sh
 
 systemctl reload log2ram
diff --git a/uninstall.sh b/uninstall.sh
index 47bfad3..7a82692 100644
--- a/uninstall.sh
+++ b/uninstall.sh
@@ -1,6 +1,6 @@
-#!/bin/sh
+#!/usr/bin/env sh
 
-if [ $(id -u) -eq 0 ]
+if [ "$(id -u)" -eq 0 ]
 then
   service log2ram stop
   systemctl disable log2ram