diff --git a/download_slides.py b/download_slides.py
index caaf680..196ec9f 100644
--- a/download_slides.py
+++ b/download_slides.py
@@ -21,8 +21,8 @@ def download_file(url, file_path, timeout=30):
 
 
 # Step 1: Find all topic links on the main page
-topics_url = "https://kccncossaidevchn2024.sched.com/list/descriptions/"
-# topics_url = "https://colocatedeventseu2024.sched.com/list/descriptions/"
+default_topics_url = "https://kccncossaidevchn2024.sched.com/list/descriptions/"
+topics_url = os.getenv('SCHED_LINK', default_topics_url)
 response = requests.get(topics_url)
 topic_soup = BeautifulSoup(response.text, "html.parser")