diff --git a/ai_blocker/middleware.py b/ai_blocker/middleware.py
index 2d5eb5a..7447a52 100644
--- a/ai_blocker/middleware.py
+++ b/ai_blocker/middleware.py
@@ -25,9 +25,8 @@ class AiBlockerMiddleware:
     async def __call__(self, request):
         ua = request.headers.get("User-Agent", "")
 
-        blocked_headers = self.backer.get_ua_list()
 
-        if ua in blocked_headers:
+        if ua in self.backer:
             return HttpResponse(status=403)
 
         response = self.get_response(request)
diff --git a/ai_blocker/ualist_backers.py b/ai_blocker/ualist_backers.py
index 46019c9..d257e3a 100644
--- a/ai_blocker/ualist_backers.py
+++ b/ai_blocker/ualist_backers.py
@@ -1,3 +1,5 @@
+import re
+
 from abc import ABC, abstractmethod
 
 from django.conf import settings
@@ -9,6 +11,11 @@ class UAList(ABC):
     def get_ua_list(self) -> list[str]:
         raise NotImplemented
 
+    def __contains__(self, item):
+        list = self.get_ua_list()
+        pattern = "|".join(list)
+        return re.search(pattern, item) is not None
+
 
 
 class ConfigBackedUAList(UAList):