diff --git a/CHANGELOG.rst b/CHANGELOG.rst
new file mode 100644
index 0000000000000000000000000000000000000000..8e2bd9e02052986f0a9f0f2ea4cca0c5e45f6395
--- /dev/null
+++ b/CHANGELOG.rst
@@ -0,0 +1,24 @@
+Changelog
+=========
+
+`1.0a1`_
+--------
+
+New features
+~~~~~~~~~~~~
+
+* Support lesson cancellation
+* Devs: Add fully pythonic API for calendar weeks
+
+Bugfixes
+~~~~~~~~
+
+* Redirect to correct date after editing a substitution
+* Correctly display teachers for substituted lessons
+
+Minor changes
+~~~~~~~~~~~~~
+
+* Use bootstrap buttons everywhere
+
+_`1.0a1`: https://edugit.org/Teckids/BiscuIT/BiscuIT-App-Chronos/-/tags/1.0a1
diff --git a/pyproject.toml b/pyproject.toml
index e29416a8c6fcb37f1741de43ff07bcf27d9362b8..5afb2084239f79ae1ed61bd0e4c60c008e917612 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "BiscuIT-App-Chronos"
-version = "1.0a1.dev0"
+version = "1.0a1"
 packages = [
     { include = "biscuit" }
 ]