diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..b2e7696
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,26 @@
+# ChangeLog
+
+## 2.1.0 - 2025-08-03
+
+### Changed
+
+- when fields are CHOICEs now both the field name and the choice name are shown (fixes GitHub #102)
+
+### Added
+
+- add tests to check expected decoding
+
+## 2.0.6 - 2025-07-29
+
+### Added
+
+- add proper support for standard Base64 (we previously only supported Base64url) (fixes GitHub #99)
+- improve test harness
+
+## 2.0.5 - 2025-04-12
+
+### Added
+
+- add `index-local.html` for local `file://` usage without needing a web server
+- add definitions support for `LDAPMessage`
+- #TODO continue producing old ChangeLog entries
diff --git a/README.md b/README.md
index 7c0a62b..1700783 100644
--- a/README.md
+++ b/README.md
@@ -105,4 +105,5 @@ links
 - [dedicated domain](https://asn1js.eu/)
 - [InDefero tracker](http://idf.lapo.it/p/asn1js/)
 - [GitHub mirror](https://github.com/lapo-luchini/asn1js)
+- [ChangeLog on GitHub](https://github.com/lapo-luchini/asn1js/blob/trunk/CHANGELOG.md)
 - [Ohloh code stats](https://www.openhub.net/p/asn1js)
diff --git a/index.html b/index.html
index 8a80ccb..8b3fd93 100644
--- a/index.html
+++ b/index.html
@@ -107,6 +107,7 @@
       <li>previous versions on githack: <select id="tags"><option>[select tag]</option></select></li>
       <li><a href="http://idf.lapo.it/p/asn1js/">InDefero tracker</a> (currently offline)</li>
       <li><a href="https://github.com/lapo-luchini/asn1js">github mirror</a></li>
+      <li><a href="https://github.com/lapo-luchini/asn1js/blob/trunk/CHANGELOG.md">ChangeLog on GitHub</a></li>
       <li><a href="https://www.openhub.net/p/asn1js">OpenHub code stats</a></li>
     </ul>
   </div>
diff --git a/release.sh b/release.sh
index 3a7d0bf..8723986 100755
--- a/release.sh
+++ b/release.sh
@@ -5,7 +5,7 @@ FILES="
   rfcdef.js test.js tags.js
   index.html index.css index.js index-local.html
   favicon.svg tree-icon-light.svg tree-icon-dark.svg
-  README.md LICENSE
+  README.md LICENSE CHANGELOG.md
   updateOID.sh check.sh
   examples
 "
diff --git a/tags.js b/tags.js
index c7c7902..29d8aeb 100644
--- a/tags.js
+++ b/tags.js
@@ -1,4 +1,6 @@
 export const tags = {
+  "2.1.0": "2025-08-03",
+  "2.0.6": "2025-07-28",
   "2.0.5": "2025-04-12",
   "2.0.4": "2024-05-08",
   "2.0.3": "2024-05-06",