diff --git a/scripts/install b/scripts/install
index d443955..1a1a84f 100644
--- a/scripts/install
+++ b/scripts/install
@@ -22,6 +22,8 @@ pushd "$install_dir"
 	mv $YNH_ARCH $app
 popd
 
+chmod 750 "$install_dir"
+chmod -R o-rwx "$install_dir"
 chown -R $app:www-data "$install_dir"
 chmod +x $install_dir/$app
 
diff --git a/scripts/restore b/scripts/restore
index 99bd12d..dc064f5 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -16,6 +16,8 @@ ynh_script_progression --message="Restoring $app main directory..." --weight=4
 
 ynh_restore_file --origin_path="$install_dir"
 
+chmod 750 "$install_dir"
+chmod -R o-rwx "$install_dir"
 chown -R $app:www-data "$install_dir"
 chmod +x $install_dir/$app
 
diff --git a/scripts/upgrade b/scripts/upgrade
index 47ee748..4625c46 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -41,6 +41,8 @@ then
 	popd
 fi
 
+chmod 750 "$install_dir"
+chmod -R o-rwx "$install_dir"
 chown -R $app:www-data "$install_dir"
 chmod +x $install_dir/$app