diff --git a/scripts/install b/scripts/install
index edf468b..120046b 100644
--- a/scripts/install
+++ b/scripts/install
@@ -1,3 +1,8 @@
+#!/bin/bash
+
+# Define app
+app=phpsysinfo
+
 # Retrieve arguments
 domain=$1
 path=$2
diff --git a/scripts/remove b/scripts/remove
index d47d5dc..448944e 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -1,3 +1,8 @@
+#!/bin/bash
+
+# Define app
+app=phpsysinfo
+
 # Retrieve app settings
 domain=$(ynh_app_setting_get "$app" domain)
 path=$(ynh_app_setting_get "$app" path)
diff --git a/scripts/upgrade b/scripts/upgrade
index e69de29..cc1f786 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -0,0 +1 @@
+#!/bin/bash
\ No newline at end of file