diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9f70a37..bdb37c3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+### Added
+
+- JSONSchema validate:
+  - Add format checkers
+
 ## [0.3.0] - 2022-11-08
 
 ### Added
diff --git a/libcoveofds/jsonschemavalidate.py b/libcoveofds/jsonschemavalidate.py
index 48f2745..2aa8c1b 100644
--- a/libcoveofds/jsonschemavalidate.py
+++ b/libcoveofds/jsonschemavalidate.py
@@ -1,3 +1,4 @@
+from jsonschema import FormatChecker
 from jsonschema.exceptions import ValidationError as JSONSchemaExceptionsValidationError
 from jsonschema.validators import Draft202012Validator
 
@@ -9,7 +10,9 @@ def __init__(self, schema: OFDSSchema):
         self._schema = schema
 
     def validate(self, json_data: dict) -> list:
-        validator = Draft202012Validator(schema=self._schema.get_package_schema())
+        validator = Draft202012Validator(
+            schema=self._schema.get_package_schema(), format_checker=FormatChecker()
+        )
         output = []
         for e in validator.iter_errors(json_data):
             output.append(ValidationError(e, json_data, self._schema))
diff --git a/make_expected_test_data.sh b/make_expected_test_data.sh
index 04da812..8544aa1 100755
--- a/make_expected_test_data.sh
+++ b/make_expected_test_data.sh
@@ -25,6 +25,7 @@ libcoveofds jtogj --outputmetafilename tests/fixtures/json_to_geojson/no_geometr
 
 # JSON Schema validate
 libcoveofds jsv  tests/fixtures/jsonschemavalidate/basic_1.input.json > tests/fixtures/jsonschemavalidate/basic_1.expected.json
+libcoveofds jsv  tests/fixtures/jsonschemavalidate/bad_uuid_1.input.json > tests/fixtures/jsonschemavalidate/bad_uuid_1.expected.json
 
 # Python validate
 # TODO
diff --git a/tests/fixtures/jsonschemavalidate/bad_uuid_1.expected.json b/tests/fixtures/jsonschemavalidate/bad_uuid_1.expected.json
new file mode 100644
index 0000000..3d1f7b5
--- /dev/null
+++ b/tests/fixtures/jsonschemavalidate/bad_uuid_1.expected.json
@@ -0,0 +1,22 @@
+[
+    {
+        "message": "'1' is not a 'uuid'",
+        "path": [
+            "networks",
+            0,
+            "id"
+        ],
+        "schema_path": [
+            "properties",
+            "networks",
+            "items",
+            "properties",
+            "id",
+            "format"
+        ],
+        "validator": "format",
+        "data_ids": {
+            "network_id": "1"
+        }
+    }
+]
diff --git a/tests/fixtures/jsonschemavalidate/bad_uuid_1.input.json b/tests/fixtures/jsonschemavalidate/bad_uuid_1.input.json
new file mode 100644
index 0000000..0cebe72
--- /dev/null
+++ b/tests/fixtures/jsonschemavalidate/bad_uuid_1.input.json
@@ -0,0 +1,13 @@
+{
+  "networks": [
+    {
+      "id": "1",
+      "links": [
+        {
+          "rel": "describedby",
+          "href": "https://raw.githubusercontent.com/Open-Telecoms-Data/open-fibre-data-standard/0__1__0__beta/schema/network-schema.json"
+        }
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/tests/test_jsonschemavalidate.py b/tests/test_jsonschemavalidate.py
index 1687cf4..62459d6 100644
--- a/tests/test_jsonschemavalidate.py
+++ b/tests/test_jsonschemavalidate.py
@@ -9,6 +9,8 @@
 JSONSCHEMAVALIDATE_FILES = [
     # basic example
     ("basic_1"),
+    # Bad data
+    ("bad_uuid_1"),
 ]