diff --git a/README.md b/README.md
index 6b13c313..09e14e51 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ Please, include the `User-Agent` header with the name of your application or pro
 This Python package is automatically generated by the [OpenAPI Generator](https://openapi-generator.tech) project:
 
 - API version: Latest
-- Package version: 0.3.0
+- Package version: 0.3.1
 - Build package: org.openapitools.codegen.languages.PythonClientCodegen
 
 ## Requirements.
diff --git a/phrasetms_client/__init__.py b/phrasetms_client/__init__.py
index e98e657e..29abb778 100644
--- a/phrasetms_client/__init__.py
+++ b/phrasetms_client/__init__.py
@@ -14,7 +14,7 @@
 """
 
 
-__version__ = "0.3.0"
+__version__ = "0.3.1"
 
 # import apis into sdk package
 from phrasetms_client.api.additional_workflow_step_api import AdditionalWorkflowStepApi
diff --git a/phrasetms_client/configuration.py b/phrasetms_client/configuration.py
index 7ce21389..42ff2553 100644
--- a/phrasetms_client/configuration.py
+++ b/phrasetms_client/configuration.py
@@ -423,7 +423,7 @@ def to_debug_report(self):
             "OS: {env}\n"
             "Python Version: {pyversion}\n"
             "Version of the API: Latest\n"
-            "SDK Package Version: 0.3.0".format(env=sys.platform, pyversion=sys.version)
+            "SDK Package Version: 0.3.1".format(env=sys.platform, pyversion=sys.version)
         )
 
     def get_host_settings(self):
diff --git a/phrasetms_client/models/job_create_request_dto.py b/phrasetms_client/models/job_create_request_dto.py
index 922975e4..128b3590 100644
--- a/phrasetms_client/models/job_create_request_dto.py
+++ b/phrasetms_client/models/job_create_request_dto.py
@@ -25,6 +25,7 @@
 from phrasetms_client.models.providers_per_language import ProvidersPerLanguage
 from phrasetms_client.models.uid_reference import UidReference
 from phrasetms_client.models.workflow_step_configuration import WorkflowStepConfiguration
+from phrasetms_client.utils import DateTimeEncoder
 
 class JobCreateRequestDto(BaseModel):
     """
@@ -54,7 +55,7 @@ def to_str(self) -> str:
 
     def to_json(self) -> str:
         """Returns the JSON representation of the model using alias"""
-        return json.dumps(self.to_dict())
+        return json.dumps(self.to_dict(), cls=DateTimeEncoder)
 
     @classmethod
     def from_json(cls, json_str: str) -> JobCreateRequestDto:
diff --git a/phrasetms_client/utils.py b/phrasetms_client/utils.py
new file mode 100644
index 00000000..49cb59a9
--- /dev/null
+++ b/phrasetms_client/utils.py
@@ -0,0 +1,9 @@
+from datetime import datetime
+import json
+
+class DateTimeEncoder(json.JSONEncoder):
+    def default(self, o):
+        if isinstance(o, datetime):
+            return o.isoformat()
+
+        return super().default(o)
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index 53acfbd5..28e1b41b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "phrasetms_client"
-version = "0.3.0"
+version = "0.3.1"
 description = "Phrase TMS API"
 authors = ["Martin Chrástek"]
 license = "NoLicense"
diff --git a/setup.py b/setup.py
index 0deeda1b..aaa86ebb 100644
--- a/setup.py
+++ b/setup.py
@@ -21,7 +21,7 @@
 # prerequisite: setuptools
 # http://pypi.python.org/pypi/setuptools
 NAME = "phrasetms-client"
-VERSION = "0.3.0"
+VERSION = "0.3.1"
 PYTHON_REQUIRES = ">=3.7"
 REQUIRES = ["urllib3 >= 1.25.3", "python-dateutil", "pydantic >= 1.10.5, < 2", "aenum"]