diff --git a/.gitignore b/.gitignore
index 909093a..2c5ff7f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,7 @@
-*.pyc
 *.DS_Store
 *.egg-info
+*.pyc
+.idea
+.python-version
 build
 dist
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4ef580e..9258b48 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,17 @@
 # Changelog
 
+# 2.0.0 - [#41](https://github.com/openfisca/extension-template/pull/47)
+
+#### New Features
+
+- Upgrade OpenAPI specification of the API to v3 from Swagger v2.
+- Continuously validate OpenAPI specification.
+
+#### Breaking changes
+
+- Drop support for OpenAPI specification v2 and prior.
+- Users relying on the aforesaid can use [this](https://converter.swagger.io/api/convert?url=OAS2_YAML_OR_JSON_URL) to migrate ([example](https://web.archive.org/web/20221103230822/https://converter.swagger.io/api/convert?url=https://api.demo.openfisca.org/latest/spec)).
+
 ### 1.3.10 - [#42](https://github.com/openfisca/extension-template/pull/42)
 
 * Technical change
diff --git a/setup.py b/setup.py
index 925a475..37665a2 100644
--- a/setup.py
+++ b/setup.py
@@ -10,7 +10,7 @@
 
 setup(
     name = "OpenFisca-Extension-Template",
-    version = "1.3.10",
+    version = "2.0.0",
     author = "OpenFisca Team",
     author_email = "contact@openfisca.org",
     classifiers = [
@@ -36,7 +36,7 @@
         ("share/openfisca/openfisca-extension-template", ["CHANGELOG.md", "README.md"]),
         ],
     install_requires = [
-        "OpenFisca-Country-Template >= 3.8.0,  < 4",
+        "OpenFisca-Country-Template >= 5.0.0,  < 6.0.0",
         ],
     extras_require = {
         "dev": [