diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..f110723
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,14 @@
+## 3.0.0 (2016-11-14)
+
+### Changed
+* `BaseClient` method signature: `base_url` is now optional. See [#41](https://github.com/alphagov/notifications-python-client/pull/41)
+* `BaseClient` method signature: `api_key` is now a positional argument. See [#41](https://github.com/alphagov/notifications-python-client/pull/41)
+
+## 2.0.0 (2016-11-09)
+
+### Changed
+* Replace asserts with proper exceptions in jwt token code. See [#40](https://github.com/alphagov/notifications-python-client/pull/40)
+
+# Prior versions
+
+Changelog not recorded - please see pull requests on github.