diff --git a/manifest.json b/manifest.json
index 2c55bf1..dec9093 100644
--- a/manifest.json
+++ b/manifest.json
@@ -8,7 +8,7 @@
         "de": "Eine web-basierte Mehrbenutzer-Zeiterfassung mit Rechnungsdruck mit Unterstützung für mobile Endgeräte",
         "cs": "Víceuživatelská webová aplikace pro sledování času s podporou mobilních zařízení"
     },
-    "version": "1.11.1~ynh1",
+    "version": "1.15.2~ynh1",
     "url": "https://www.kimai.org",
     "license": "MIT",
     "maintainer": {
diff --git a/scripts/install b/scripts/install
index 464f4ac..c6030a6 100755
--- a/scripts/install
+++ b/scripts/install
@@ -25,7 +25,7 @@ path_url="/"
 admin=$YNH_APP_ARG_ADMIN
 is_public=$YNH_APP_ARG_IS_PUBLIC
 registration=$YNH_APP_ARG_REGISTRATION
-random_key=$(ynh_string_random 32)
+random_key=$(ynh_string_random --length=32)
 
 app=$YNH_APP_INSTANCE_NAME
 
diff --git a/scripts/upgrade b/scripts/upgrade
index 4c1c6b9..b84b2ab 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -23,6 +23,7 @@ final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 registration=$(ynh_app_setting_get --app=$app --key=registration)
 random_key=$(ynh_app_setting_get --app=$app --key=random_key)
 phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
+db_name=$(ynh_app_setting_get --app=$app --key=db_name)
 
 #=================================================
 # CHECK VERSION
@@ -55,6 +56,12 @@ if [ -z "$final_path" ]; then
 	ynh_app_setting_set --app=$app --key=final_path --value=$final_path
 fi
 
+# If db_name doesn't exist, create it
+if [ -z "$db_name" ]; then
+	db_name=$(ynh_sanitize_dbid --db_name=$app)
+	ynh_app_setting_set --app=$app --key=db_name --value=$db_name
+fi
+
 # Cleaning legacy permissions
 if ynh_legacy_permissions_exists; then
 	ynh_legacy_permissions_delete_all