diff --git a/.app_version b/.app_version
index e78439d7..8ddf20e4 100644
--- a/.app_version
+++ b/.app_version
@@ -1 +1 @@
-0.15.11
+0.15.12
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4a4a6268..f2a3b8a7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+# 0.15.12 - 2024-11-01
+
+### Added
+
+- Scratch map. You can enable it in the map controls. The scratch map highlight countries you've visited. The scratch map is working properly only if you have your points reverse geocoded.
+
 # 0.15.11 - 2024-10-29
 
 ### Added
diff --git a/app/javascript/controllers/maps_controller.js b/app/javascript/controllers/maps_controller.js
index a09e1a02..a85cc085 100644
--- a/app/javascript/controllers/maps_controller.js
+++ b/app/javascript/controllers/maps_controller.js
@@ -154,6 +154,7 @@ export default class extends Controller {
       }
     })
 
+    // the JSON is 23MB, so it's better to fetch it asynchronously or cache or use local copy
     const response = await fetch('https://raw.githubusercontent.com/datasets/geo-countries/master/data/countries.geojson')
     const worldData = await response.json()