diff --git a/scripts/install b/scripts/install
index 6d9c871..244dc09 100755
--- a/scripts/install
+++ b/scripts/install
@@ -89,8 +89,6 @@ ynh_app_setting_set $app random_key $random_key
 
 # Find a free port
 port=$(ynh_find_port 8095)
-# Open this port
-yunohost firewall allow --no-upnp TCP $port 2>&1
 ynh_app_setting_set $app port $port
 
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index 2cbf2e3..778611c 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -70,8 +70,15 @@ ynh_restore_file "/etc/nginx/conf.d/$domain.d/$app.conf"
 
 ynh_restore_file "$final_path"
 
-# open port
-yunohost firewall allow --no-upnp TCP $port 2>&1
+#=================================================
+# CLOSE A PORT
+#=================================================
+
+if yunohost firewall list | grep -q "\- $port$"
+then
+	echo "Close port $port" >&2
+	yunohost firewall disallow TCP $port 2>&1
+fi
 
 #=================================================
 # RESTORE THE PostgreSQL DATABASE
diff --git a/scripts/upgrade b/scripts/upgrade
index b2e8110..760db84 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -66,8 +66,15 @@ systemctl stop "$app"
 # Normalize the URL path syntax
 path_url=$(ynh_normalize_url_path $path_url)
 
-# Open this port
-yunohost firewall allow --no-upnp TCP $port 2>&1
+#=================================================
+# CLOSE A PORT
+#=================================================
+
+if yunohost firewall list | grep -q "\- $port$"
+then
+	echo "Close port $port" >&2
+	yunohost firewall disallow TCP $port 2>&1
+fi
 
 #=================================================
 # CREATE DEDICATED USER