diff --git a/generate.py b/generate.py
index 9ea3182..e377577 100644
--- a/generate.py
+++ b/generate.py
@@ -1,22 +1,31 @@
 import requests
 from flask import Flask, Response
+from flask_cors import CORS
+import threading
 
 app = Flask(__name__)
+CORS(app)  # Enable CORS for all routes
 
 # List of M3U file URLs
-urls = [
+URLS = [
     "https://iptv-org.github.io/iptv/index.country.m3u",
     "https://forge.fsky.io/frost/repo/raw/branch/main/tv.m3u",
     "https://raw.githubusercontent.com/Free-TV/IPTV/refs/heads/master/playlist.m3u8"
 ]
 
-combined_m3u = None  # Variable to store the combined M3U content
+# Cached M3U content and a lock for thread safety
+combined_m3u = None
+lock = threading.Lock()
 
 def fetch_m3u(url):
-    """Fetch M3U content from a given URL."""
-    response = requests.get(url)
-    response.raise_for_status()  # Raise an error for bad responses
-    return response.text
+    """Fetch M3U content from a given URL with error handling."""
+    try:
+        response = requests.get(url, timeout=5)  # Set timeout to prevent long waits
+        response.raise_for_status()  # Raise an error for bad responses
+        return response.text
+    except requests.RequestException as e:
+        print(f"Error fetching {url}: {e}")
+        return ""
 
 def combine_m3u(urls):
     """Combine M3U content from multiple URLs and remove duplicates."""
@@ -31,29 +40,29 @@ def combine_m3u(urls):
             if line.startswith('#EXTINF:'):
                 current_entry = line
             elif line and current_entry:
-                # Use the stream link as the key to ensure uniqueness
                 stream_link = line.strip()
                 if stream_link not in unique_streams:
-                    unique_streams[stream_link] = current_entry + '\n' + stream_link
-                current_entry = None  # Reset current entry after adding
+                    unique_streams[stream_link] = f"{current_entry}\n{stream_link}"
+                current_entry = None  # Reset after adding
             
-    # Return the combined M3U content
     return '#EXTM3U\n' + '\n'.join(unique_streams.values())
 
-@app.route('/all.m3u8')
+@app.route('/all.m3u')
 def serve_m3u():
-    """Serve the combined M3U file."""
+    """Serve the cached combined M3U file, generating it if necessary."""
     global combined_m3u
-    if combined_m3u is None:  # Generate if not already done
-        combined_m3u = combine_m3u(urls)
+    with lock:
+        if combined_m3u is None:  # Generate if not already done
+            combined_m3u = combine_m3u(URLS)
     return Response(combined_m3u, mimetype='application/vnd.apple.mpegurl')
 
 @app.route('/generate')
 def generate_m3u():
-    """Regenerate the M3U file from the sources."""
+    """Force regeneration of the M3U file from the sources."""
     global combined_m3u
-    combined_m3u = combine_m3u(urls)  # Regenerate the M3U content
+    with lock:
+        combined_m3u = combine_m3u(URLS)  # Regenerate the M3U content
     return Response("M3U playlist regenerated!", mimetype='text/plain')
 
 if __name__ == '__main__':
-    app.run(host='0.0.0.0', port=5000)
+    app.run(host='0.0.0.0', port=5000, threaded=True)