diff --git a/CHANGELOG.md b/CHANGELOG.md
index b9b10dcb..c266132f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+## [4.40.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.39.1...v4.40.0) (2025-10-20)
+
+
+### Features
+
+* **levels:** progressive animation speed for Dan levels ([9dff3e7](https://github.com/antialias/soroban-abacus-flashcards/commit/9dff3e7b7b1ca46ea7f19a48135124b80c5182c0))
+
 ## [4.39.1](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.39.0...v4.39.1) (2025-10-20)
 
 
diff --git a/package.json b/package.json
index d926bc51..c6d32845 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "soroban-monorepo",
-  "version": "4.39.1",
+  "version": "4.40.0",
   "private": true,
   "description": "Beautiful Soroban Flashcard Generator - Monorepo",
   "workspaces": [