diff --git a/credentials/apps/edx_credentials_extensions/edly_credentials_app/api/v1/constants.py b/credentials/apps/edx_credentials_extensions/edly_credentials_app/api/v1/constants.py
index 793c035ae..853546b8b 100644
--- a/credentials/apps/edx_credentials_extensions/edly_credentials_app/api/v1/constants.py
+++ b/credentials/apps/edx_credentials_extensions/edly_credentials_app/api/v1/constants.py
@@ -20,3 +20,9 @@
 ]
 
 EDLY_PANEL_WORKER_USER = 'edly_panel_worker'
+
+AVAILABLE_THEMES = [
+    'openedx'
+]
+
+DEFAULT_THEME = 'openedx'
diff --git a/credentials/apps/edx_credentials_extensions/edly_credentials_app/api/v1/views/edly_sites.py b/credentials/apps/edx_credentials_extensions/edly_credentials_app/api/v1/views/edly_sites.py
index e7ce6185f..7636542e7 100644
--- a/credentials/apps/edx_credentials_extensions/edly_credentials_app/api/v1/views/edly_sites.py
+++ b/credentials/apps/edx_credentials_extensions/edly_credentials_app/api/v1/views/edly_sites.py
@@ -9,7 +9,7 @@
 
 from credentials.apps.core.models import SiteConfiguration
 from credentials.apps.edx_credentials_extensions.edly_credentials_app.api.permissions import CanAccessSiteCreation
-from credentials.apps.edx_credentials_extensions.edly_credentials_app.api.v1.constants import ERROR_MESSAGES
+from credentials.apps.edx_credentials_extensions.edly_credentials_app.api.v1.constants import ERROR_MESSAGES, AVAILABLE_THEMES, DEFAULT_THEME
 from credentials.apps.edx_credentials_extensions.edly_credentials_app.helpers import (
     get_credentials_site_configuration,
     validate_site_configurations,
@@ -72,7 +72,7 @@ def process_client_sites_setup(self):
                 edx_org_short_name=edly_slug,
                 platform_name=self.request.data.get('platform_name', ''),
                 company_name=self.request.data.get('platform_name', ''),
-                theme_name=theme_dir_name,
+                theme_name=theme_dir_name if theme_dir_name in AVAILABLE_THEMES else DEFAULT_THEME,
                 lms_url_root=lms_url_root,
                 catalog_api_url=catalog_api_url,
                 tos_url='{lms_url_root}/tos'.format(lms_url_root=lms_url_root),