diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index dba43328..813a7458 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,5 +1,12 @@
 ===========
 Wijzigingen
+===========
+1.3.1 (2023-02-21)
+===========
+* add search parameters to request body of `_zoek`.
+* set vng-api-common to 2.0.4.
+* remove standard /api/v1 prefix from OAS generation.
+
 ===========
 1.3.0 (2022-12-19)
 ===========
@@ -31,7 +38,7 @@ Implementation changes
 ----------------------
 
 * Corrected ZIO create documentation
-* Added new notifications module 
+* Added new notifications module
 * replaced ``drf-yasg`` by ``drf-spectacular`` due to yasg not supporting Django 3.2
 * Add missing ``bleach`` dependency
 
diff --git a/README.rst b/README.rst
index 12937bce..15e14ebc 100644
--- a/README.rst
+++ b/README.rst
@@ -2,7 +2,7 @@
 Zaken API
 =========
 
-:Version: 1.3.0
+:Version: 1.3.1
 :Source: https://github.com/VNG-Realisatie/zaken-api
 :Keywords: zaken, zaakgericht werken, GEMMA, RGBZ, ZRC
 
diff --git a/package.json b/package.json
index d4d594b5..9d6bef51 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "zrc",
-  "version": "1.3.0",
+  "version": "1.3.1",
   "description": "zrc referentie implementatie API",
   "directories": {
     "doc": "doc"
diff --git a/src/openapi.yaml b/src/openapi.yaml
index 37be32a5..06f888d9 100644
--- a/src/openapi.yaml
+++ b/src/openapi.yaml
@@ -1,7 +1,7 @@
 openapi: 3.0.3
 info:
   title: Zaken API
-  version: 1.3.0
+  version: 1.3.1
   description: "Een API om een zaakregistratiecomponent (ZRC) te benaderen.
 
 
diff --git a/src/zrc/api/tests/test_dso_api_strategy.py b/src/zrc/api/tests/test_dso_api_strategy.py
index db8e438d..b7640b74 100644
--- a/src/zrc/api/tests/test_dso_api_strategy.py
+++ b/src/zrc/api/tests/test_dso_api_strategy.py
@@ -23,7 +23,7 @@ def test_api_19_documentation_version_yaml(self):
     @override_settings(ROOT_URLCONF="zrc.api.tests.test_urls")
     def test_api_24_version_header(self):
         response = self.client.get("/test-view")
-        self.assertEqual(response["API-version"], "1.3.0")
+        self.assertEqual(response["API-version"], "1.3.1")
 
 
 class DSOApi50Tests(APITestCase):
diff --git a/src/zrc/api/tests/test_zaak_zoek.py b/src/zrc/api/tests/test_zaak_zoek.py
index 58d67810..bec7248e 100644
--- a/src/zrc/api/tests/test_zaak_zoek.py
+++ b/src/zrc/api/tests/test_zaak_zoek.py
@@ -375,9 +375,16 @@ def test_zoek_rol__omschrijving_generiek(self):
     def test_zoek_maximale_vertrouwelijkheidaanduidingn(self):
         zaak1, zaak2, zaak3 = ZaakFactory.create_batch(3)
         url = get_operation_url("zaak__zoek")
+
+        zaak1.vertrouwelijkheidaanduiding = VertrouwelijkheidsAanduiding.vertrouwelijk
+        zaak1.save()
+
         zaak2.vertrouwelijkheidaanduiding = VertrouwelijkheidsAanduiding.openbaar
         zaak2.save()
 
+        zaak3.vertrouwelijkheidaanduiding = VertrouwelijkheidsAanduiding.confidentieel
+        zaak3.save()
+
         data = {
             "maximale_vertrouwelijkheidaanduiding": zaak2.vertrouwelijkheidaanduiding
         }
diff --git a/src/zrc/conf/includes/api.py b/src/zrc/conf/includes/api.py
index a2e5554a..3f234ee1 100644
--- a/src/zrc/conf/includes/api.py
+++ b/src/zrc/conf/includes/api.py
@@ -2,7 +2,7 @@
 
 from vng_api_common.conf.api import *  # noqa - imports white-listed
 
-API_VERSION = "1.3.0"
+API_VERSION = "1.3.1"
 
 REST_FRAMEWORK = BASE_REST_FRAMEWORK.copy()
 REST_FRAMEWORK["PAGE_SIZE"] = 100