diff --git a/.changeset/pre.json b/.changeset/pre.json
index 88d22cd..c519db5 100644
--- a/.changeset/pre.json
+++ b/.changeset/pre.json
@@ -4,5 +4,7 @@
   "initialVersions": {
     "fingerprint-pro-server-api-python-sdk": "8.2.0"
   },
-  "changesets": []
+  "changesets": [
+    "kind-walls-accept"
+  ]
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index fbca8ee..cea534c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Fingerprint Pro Server Python SDK
 
+## 8.2.1-dev.0
+
+### Patch Changes
+
+- Correctly serialize nullable fields to `null` ([5c21ca0](https://github.com/fingerprintjs/fingerprint-pro-server-api-python-sdk/commit/5c21ca0acaec7d48c2db1292c126bef2fbbbca0e))
+
 ## 8.2.0
 
 ### Minor Changes
diff --git a/README.md b/README.md
index 0700a4c..ee4c2d0 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ The Fingerprint Server Python SDK is an easy way to interact with the Fingerprin
 This Python package is automatically generated by the [Swagger Codegen](https://github.com/swagger-api/swagger-codegen) project:
 
 - API version: 3
-- Package version: 8.2.0
+- Package version: 8.2.1-dev.0
 - Build package: io.swagger.codegen.v3.generators.python.PythonClientCodegen
 
 ## Requirements
diff --git a/fingerprint_pro_server_api_sdk/api/fingerprint_api.py b/fingerprint_pro_server_api_sdk/api/fingerprint_api.py
index 19aa9cb..7d983ab 100644
--- a/fingerprint_pro_server_api_sdk/api/fingerprint_api.py
+++ b/fingerprint_pro_server_api_sdk/api/fingerprint_api.py
@@ -103,7 +103,7 @@ def delete_visitor_data_with_http_info(self, visitor_id: str, **kwargs):  # noqa
         if 'visitor_id' in params:
             path_params['visitor_id'] = params['visitor_id']  # noqa: E501
 
-        query_params = [('ii', 'fingerprint-pro-server-python-sdk/8.2.0')]
+        query_params = [('ii', 'fingerprint-pro-server-python-sdk/8.2.1-dev.0')]
 
         header_params = {}
 
@@ -213,7 +213,7 @@ def get_event_with_http_info(self, request_id: str, **kwargs):  # noqa: E501
         if 'request_id' in params:
             path_params['request_id'] = params['request_id']  # noqa: E501
 
-        query_params = [('ii', 'fingerprint-pro-server-python-sdk/8.2.0')]
+        query_params = [('ii', 'fingerprint-pro-server-python-sdk/8.2.1-dev.0')]
 
         header_params = {}
 
@@ -315,7 +315,7 @@ def get_related_visitors_with_http_info(self, visitor_id: str, **kwargs):  # noq
 
         path_params = {}
 
-        query_params = [('ii', 'fingerprint-pro-server-python-sdk/8.2.0')]
+        query_params = [('ii', 'fingerprint-pro-server-python-sdk/8.2.1-dev.0')]
         if 'visitor_id' in params:
             query_params.append(('visitor_id', params['visitor_id']))  # noqa: E501
 
@@ -442,7 +442,7 @@ def get_visits_with_http_info(self, visitor_id: str, **kwargs):  # noqa: E501
         if 'visitor_id' in params:
             path_params['visitor_id'] = params['visitor_id']  # noqa: E501
 
-        query_params = [('ii', 'fingerprint-pro-server-python-sdk/8.2.0')]
+        query_params = [('ii', 'fingerprint-pro-server-python-sdk/8.2.1-dev.0')]
         if 'request_id' in params:
             query_params.append(('request_id', params['request_id']))  # noqa: E501
         if 'linked_id' in params:
@@ -565,7 +565,7 @@ def update_event_with_http_info(self, body: EventsUpdateRequest, request_id: str
         if 'request_id' in params:
             path_params['request_id'] = params['request_id']  # noqa: E501
 
-        query_params = [('ii', 'fingerprint-pro-server-python-sdk/8.2.0')]
+        query_params = [('ii', 'fingerprint-pro-server-python-sdk/8.2.1-dev.0')]
 
         header_params = {}
 
diff --git a/fingerprint_pro_server_api_sdk/api_client.py b/fingerprint_pro_server_api_sdk/api_client.py
index be54606..e03f872 100644
--- a/fingerprint_pro_server_api_sdk/api_client.py
+++ b/fingerprint_pro_server_api_sdk/api_client.py
@@ -79,7 +79,7 @@ def __init__(self, configuration: Optional[Configuration] = None, header_name: O
             self.default_headers[header_name] = header_value
         self.cookie = cookie
         # Set default User-Agent.
-        self.user_agent = 'Swagger-Codegen/8.2.0/python'
+        self.user_agent = 'Swagger-Codegen/8.2.1-dev.0/python'
 
     def __del__(self):
         self.pool.close()
diff --git a/fingerprint_pro_server_api_sdk/configuration.py b/fingerprint_pro_server_api_sdk/configuration.py
index 47e6f6a..ad91b65 100644
--- a/fingerprint_pro_server_api_sdk/configuration.py
+++ b/fingerprint_pro_server_api_sdk/configuration.py
@@ -210,5 +210,5 @@ def to_debug_report(self):
                "OS: {env}\n"\
                "Python Version: {pyversion}\n"\
                "Version of the API: 3\n"\
-               "SDK Package Version: 8.2.0".\
+               "SDK Package Version: 8.2.1-dev.0".\
                format(env=sys.platform, pyversion=sys.version)
diff --git a/package.json b/package.json
index 04a25bf..fee1d86 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "fingerprint-pro-server-api-python-sdk",
-  "version": "8.2.0",
+  "version": "8.2.1-dev.0",
   "private": true,
   "devDependencies": {
     "@changesets/cli": "^2.27.8",
diff --git a/setup.cfg b/setup.cfg
index f6a570e..77f0f8c 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,2 +1,2 @@
 [metadata]
-version = 8.2.0
+version = 8.2.1-dev.0
diff --git a/test/test_fingerprint_api.py b/test/test_fingerprint_api.py
index ede0b5b..cec60f9 100644
--- a/test/test_fingerprint_api.py
+++ b/test/test_fingerprint_api.py
@@ -26,7 +26,7 @@
 
 API_KEY = 'private_key'
 
-VERSION = '8.2.0'
+VERSION = '8.2.1-dev.0'
 
 MOCK_GET_VISITORS_200_LIMIT_1 = 'get_visitors_200_limit_1.json'
 MOCK_GET_VISITORS_200_LIMIT_500 = 'get_visitors_200_limit_500.json'