diff --git a/emacs/init.el b/emacs/init.el
index bb2f9ef..26f214a 100644
--- a/emacs/init.el
+++ b/emacs/init.el
@@ -6,6 +6,8 @@
 (setq custom-file (locate-user-emacs-file "custom-vars.el"))
 
 ;;; Elpaca package manager
+;; Update this when updating Emacs version
+(defvar elpaca-core-date '(20250814))
 (defvar elpaca-installer-version 0.11)
 (defvar elpaca-directory (expand-file-name "elpaca/" user-emacs-directory))
 (defvar elpaca-builds-directory (expand-file-name "builds/" elpaca-directory))