diff --git a/_data/conferences.yml b/_data/conferences.yml
index 79a78caaf2..2e3f462cf7 100644
--- a/_data/conferences.yml
+++ b/_data/conferences.yml
@@ -65,6 +65,7 @@
   link: https://istanbul.python.pizza/
   cfp_link: https://istanbul.python.pizza/cfp/
   cfp: '2026-08-25 23:59:00'
+  cfp_ext: '2026-09-07 23:59:00'
   place: Istanbul, Turkey
   start: 2026-11-14
   end: 2026-11-14