diff --git a/pkgs/development/python-modules/pycfmodel/default.nix b/pkgs/development/python-modules/pycfmodel/default.nix
index f361b3803bca..a2798e8199e6 100644
--- a/pkgs/development/python-modules/pycfmodel/default.nix
+++ b/pkgs/development/python-modules/pycfmodel/default.nix
@@ -6,26 +6,31 @@
   pydantic,
   pytestCheckHook,
   pythonOlder,
+  pythonRelaxDepsHook,
   setuptools,
 }:
 
 buildPythonPackage rec {
   pname = "pycfmodel";
-  version = "0.22.0";
+  version = "1.0.0";
   pyproject = true;
 
-  disabled = pythonOlder "3.7";
+  disabled = pythonOlder "3.8";
 
   src = fetchFromGitHub {
     owner = "Skyscanner";
     repo = "pycfmodel";
-    rev = "refs/tags/v${version}";
-    hash = "sha256-NLi94W99LhrBXNFItMfJczV9EZlgvmvkavrfDQJs0YU=";
+    rev = "refs/tags/${version}";
+    hash = "sha256-iCjOSwW6rdG3H4e/B/um+QioP45nOr9OcPAwXxZs3mU=";
   };
 
-  nativeBuildInputs = [ setuptools ];
+  pythonRelaxDeps = [ "pydantic" ];
 
-  propagatedBuildInputs = [ pydantic ];
+  build-system = [ setuptools ];
+
+  nativeBuildInputs = [ pythonRelaxDepsHook ];
+
+  dependencies = [ pydantic ];
 
   nativeCheckInputs = [
     httpx
@@ -39,6 +44,10 @@ buildPythonPackage rec {
     "test_valid_es_domain_from_aws_documentation_examples_resource_can_be_built"
     "test_valid_opensearch_domain_from_aws_documentation_examples_resource_can_be_built"
     "test_resolve_booleans_different_properties_for_generic_resource"
+    "test_loose_ip"
+    "test_extra_fields_not_allowed_s3_bucket"
+    "test_raise_error_if_invalid_fields_in_resource"
+    ""
   ];
 
   pythonImportsCheck = [ "pycfmodel" ];
@@ -49,6 +58,5 @@ buildPythonPackage rec {
     changelog = "https://github.com/Skyscanner/pycfmodel/releases/tag/v${version}";
     license = licenses.asl20;
     maintainers = with maintainers; [ fab ];
-    broken = versionAtLeast pydantic.version "2";
   };
 }