diff --git a/scripts/.fonctions b/scripts/.fonctions
index 7cfcd41..228cce7 100644
--- a/scripts/.fonctions
+++ b/scripts/.fonctions
@@ -97,7 +97,7 @@ SETUP_SOURCE () {	# Télécharge la source, décompresse et copie dans $final_pa
 	pushd $final_path
 	sudo unzip source.zip
 	sudo rm Install_PrestaShop.html index.php
-	sudo unzip prestashop.zip
+	sudo unzip -o prestashop.zip
 	sudo rm prestashop.zip
 	sudo rm source.zip
 }
diff --git a/scripts/upgrade b/scripts/upgrade
index c6636bc..1201930 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -30,6 +30,9 @@ final_path=/var/www/$app
 
 SETUP_SOURCE
 
+# Delete install directory after upgrade
+rm -fr "$final_path/install"
+
 db_name=$app
 
 # Modify Nginx configuration file and copy it to Nginx conf directory