diff --git a/conf/config.json b/conf/config.json
index b196d88..5b895ab 100644
--- a/conf/config.json
+++ b/conf/config.json
@@ -33,6 +33,9 @@
             "matrix.org"
         ]
     },
+    "branding": {
+      "welcome_background_url": "--WELCOME_BACKGROUND_URL__",
+   },
     "piwik": {
         "url": "https://piwik.riot.im/",
         "whitelistedHSUrls": ["https://matrix.org"],
diff --git a/config_panel.toml b/config_panel.toml
index 32553dc..d720e69 100644
--- a/config_panel.toml
+++ b/config_panel.toml
@@ -12,3 +12,10 @@ name = "Element configuration"
         default = "https://matrix-client.matrix.org"
         pattern.regexp = '^https://'
         bind = "base_url:__FINALPATH__/config.json"
+
+        [main.config.welcome_background_url]
+        ask = "Welcome background URL"
+        type = "file"
+        accept = ".png, .jpg"
+        help = "When a string, the URL for the full-page image background of the login, registration, and welcome pages. This property can additionally be an array to have the app choose an image at random from the selections."
+        bind = "welcome_background_url:__FINALPATH__/config.json"
diff --git a/scripts/install b/scripts/install
index 39c9aec..b5020d3 100644
--- a/scripts/install
+++ b/scripts/install
@@ -25,6 +25,7 @@ domain=$YNH_APP_ARG_DOMAIN
 path_url=$YNH_APP_ARG_PATH
 is_public=$YNH_APP_ARG_IS_PUBLIC
 default_home_server=$YNH_APP_ARG_DEFAULT_HOME_SERVER
+welcome_background_url=$""
 
 app=$YNH_APP_INSTANCE_NAME
 
diff --git a/scripts/upgrade b/scripts/upgrade
index ba4ec4c..05991b5 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -20,6 +20,7 @@ domain=$(ynh_app_setting_get --app=$app --key=domain)
 path_url=$(ynh_app_setting_get --app=$app --key=path)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 default_home_server=$(ynh_app_setting_get --app=$app --key=default_home_server)
+welcome_background_url=$(ynh_app_setting_get --app=$app --key=welcome_background_url)
 
 #=================================================
 # CHECK VERSION
@@ -52,6 +53,12 @@ if [ -z "$default_home_server" ]; then
 	ynh_app_setting_set --app=$app --key=default_home_server --value=$default_home_server
 fi
 
+# If welcome_background_url doesn't exist, create it
+if [ -z "$welcome_background_url" ]; then
+	welcome_background_url="https://matrix-client.matrix.org"
+	ynh_app_setting_set --app=$app --key=welcome_background_url --value=$welcome_background_url
+fi
+
 # Cleaning legacy permissions
 if ynh_legacy_permissions_exists; then
 	ynh_legacy_permissions_delete_all