diff --git a/CHANGELOG.md b/CHANGELOG.md
index fbcde4db..ec498c82 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,11 @@
+## 1.2.0
+This introduces a new versioning system where the first two numbers refer to
+the matrix spec version (currently v1.2) and the last to the iteration of
+this spec version.
+
+- feat: Migrate to Matrix v1.2 spec
+- feat: Add GroupCallPrefix/GroupCallMemberPrefix to EventTypes.
+
 ## 0.5.3
 - chore: Add missing matrix error types as per spec
 - feat: add additionalProperties in PusherData
diff --git a/pubspec.yaml b/pubspec.yaml
index ac375342..1cdb8463 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: matrix_api_lite
 description: Dead simple data model for the matrix.org client-server API.
-version: 0.5.3
+version: 1.0.0
 homepage: https://famedly.com
 repository: https://gitlab.com/famedly/company/frontend/libraries/matrix_api_lite/
 issues: https://gitlab.com/famedly/company/frontend/libraries/matrix_api_lite/-/issues