diff --git a/frappe/website/doctype/website_theme/website_theme.py b/frappe/website/doctype/website_theme/website_theme.py
index 23e2bbe32b..8f9841c924 100644
--- a/frappe/website/doctype/website_theme/website_theme.py
+++ b/frappe/website/doctype/website_theme/website_theme.py
@@ -63,6 +63,7 @@ def use_theme(theme):
 
 def add_website_theme(context):
 	bootstrap = frappe.get_hooks("bootstrap")[0]
+	bootstrap = [bootstrap]
 	context.theme = frappe._dict()
 
 	if not context.disable_website_theme:
@@ -71,11 +72,11 @@ def add_website_theme(context):
 
 		if website_theme:
 			if website_theme.bootstrap:
-				bootstrap = website_theme.bootstrap
+				bootstrap.append(website_theme.bootstrap)
 
 			context.web_include_css = context.web_include_css + ["website_theme.css"]
 
-	context.web_include_css = [bootstrap] + context.web_include_css
+	context.web_include_css = bootstrap + context.web_include_css
 
 def get_active_theme():
 	website_theme = frappe.db.get_value("Website Settings", "Website Settings", "website_theme")