diff --git a/M3U8/scrapers/utils/webwork.py b/M3U8/scrapers/utils/webwork.py
index 5d34c0d..540144e 100644
--- a/M3U8/scrapers/utils/webwork.py
+++ b/M3U8/scrapers/utils/webwork.py
@@ -87,7 +87,10 @@ class Network:
         if not patterns:
             patterns = ["amazonaws", "knitcdn"]
 
-        pattern = re.compile(rf"^.*\.m3u8(?!.*({'|'.join(patterns)}))")
+        pattern = re.compile(
+            rf"^(?!.*({'|'.join(patterns)})).*\.m3u8",
+            re.IGNORECASE,
+        )
 
         if pattern.search(req.url):
             captured.append(req.url)