diff --git a/CHANGELOG.md b/CHANGELOG.md
index d116ded4..3f84535a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,58 @@
 # Changelog
 
+### 22.0.0 - [69](https://github.com/digitalaotearoa/openfisca-aotearoa/pull/64)
+
+* Tax and benefit system evolution.
+* Impacted periods: all.
+* Impacted areas:
+  - `CONTRIBUTING.md`
+  - `Makefile`
+  - `variables/acts/social_security/childcare_assistance`
+  - `variables/regulation/social_security_regulation`
+  - `variables/demographics`
+  - `parameters/social_security/childcare_assistance`
+
+* Breaking changes:
+ - `early_childcare_hours_participation_per_week` period changed from month to week
+ - `attending_school` period changed from month to week
+
+* Added variables:
+ - `child_disability_allowance__payable`
+ - `childcare_subsidy__eligible`
+ - `childcare_subsidy__granted`
+ - `childcare_subsidy__receiving`
+ - `childcare_subsidy__hours_payable`
+ - `childcare_subsidy__caregiver_approved_activity`
+ - `childcare_subsidy__caregiver_approved_activity_hours`
+ - `childcare_subsidy__caregiver_serious_disability`
+ - `childcare_subsidy__caregiver_serious_disability_hours`
+ - `childcare_subsidy__caregiver_other_hours`
+ - `childcare_subsidy__caregiver_serious_disability_illness`
+ - `childcare_subsidy__caregiver_serious_disability_illness_hours_needed`
+ - `childcare_subsidy__no_other_caregiver`
+ - `childcare_subsidy__other_child_in_hospital_or_disability_allowance`
+ - `childcare_subsidy__other_caregiver_appproved_activity`
+ - `childcare_subsidy__engaged_in_approved_activity`
+ - `childcare_subsidy__shift_work`
+ - `childcare_subsidy__family_has_resident_child_under_5_not_in_school`
+ - `childcare_subsidy__resident_child_aged_5_intend_enrol_in_school`
+ - `childcare_subsidy__family_with_disability_allowance_child_under_6`
+ - `childcare_subsidy__child_under_5_not_in_school`
+ - `childcare_subsidy__child_aged_5_intend_enrol_in_school`
+ - `childcare_subsidy__child_meets_criteria_with_disability_allowance_under_6`
+ - `childcare_subsidy__child_meets_criteria`
+ - `childcare_subsidy__maximum`
+ - `childcare_subsidy__rate`
+ - `oscar_subsidy__granted`
+ - `social_security_regulation__household_income`
+
+* Renamed variables:
+ - `will_be_enrolled_in_school` renamed to `intends_to_enroll_in_school`  period changed from month to eternity
+ - `childcare_assistance__family_has_resident_child_under_5_not_in_school` renamed to `childcare_subsidy__family_has_resident_child_under_5_not_in_school`
+ - `childcare_assistance__resident_child_aged_5_will_be_enrolled_in_school` renamed to `childcare_subsidy__resident_child_aged_5_intend_enrol_in_school`
+ - `childcare_assistance__family_has_child_eligible_for_disability_allowance_child_under_6` renamed to `childcare_subsidy__family_with_disability_allowance_child_under_6`
+ - `childcare_assistance__eligible_childcare_subsidy` renamed to `childcare_subsidy__eligible`
+
 ### 21.1.1 - [64](https://github.com/digitalaotearoa/openfisca-aotearoa/pull/64)
 
 * Technical improvement.
diff --git a/pyproject.toml b/pyproject.toml
index 21e576cd..473a891c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "openfisca-aotearoa"
-version = "21.1.1"
+version = "22.0.0"
 dependencies = [
     "openfisca-core[web-api] >=41.4.5, <42",
     "pandas>=2.2.1",
@@ -97,8 +97,8 @@ known_openfisca = [
     "openfisca_aotearoa"
 ]
 known_typing = [
-    "mypy*", 
-    "*types*", 
+    "mypy*",
+    "*types*",
     "*typing*"
 ]
 sections = [