diff --git a/searx/settings.yml b/searx/settings.yml
index cec9889b..69dc6957 100644
--- a/searx/settings.yml
+++ b/searx/settings.yml
@@ -76,7 +76,7 @@ ui:
   # it decreases the privacy, since the browser can records the page titles.
   query_in_title: false
   # ui theme
-  default_theme: oscar
+  default_theme: simple
   # Default interface locale - leave blank to detect from browser information or
   # use codes from the 'locales' config section
   default_locale: ""
diff --git a/searx/settings_defaults.py b/searx/settings_defaults.py
index 15b4524c..6808b095 100644
--- a/searx/settings_defaults.py
+++ b/searx/settings_defaults.py
@@ -177,7 +177,7 @@ SCHEMA = {
     'ui': {
         'static_path': SettingsDirectoryValue(str, os.path.join(searx_dir, 'static')),
         'templates_path': SettingsDirectoryValue(str, os.path.join(searx_dir, 'templates')),
-        'default_theme': SettingsValue(str, 'oscar'),
+        'default_theme': SettingsValue(str, 'simple'),
         'default_locale': SettingsValue(str, ''),
         'theme_args': {
             'oscar_style': SettingsValue(OSCAR_STYLE, 'logicodev'),
diff --git a/searxng_extra/standalone_searx.py b/searxng_extra/standalone_searx.py
index baf8db0b..0a1e1884 100755
--- a/searxng_extra/standalone_searx.py
+++ b/searxng_extra/standalone_searx.py
@@ -105,7 +105,7 @@ def get_search_query(
         "language": args.lang,
         "time_range": args.timerange,
     }
-    preferences = searx.preferences.Preferences(['oscar'], engine_categories, searx.engines.engines, [])
+    preferences = searx.preferences.Preferences(['simple'], engine_categories, searx.engines.engines, [])
     preferences.key_value_settings['safesearch'].parse(args.safesearch)
 
     search_query = searx.webadapter.get_search_query_from_webapp(preferences, form)[0]