diff --git a/.sdk-version b/.sdk-version
index 8a5b818..1defe53 100644
--- a/.sdk-version
+++ b/.sdk-version
@@ -1 +1 @@
-v2.0.4
+v2.1.0
diff --git a/docs/AppApiRestV2FunctionsResponsesFunction.md b/docs/AppApiRestV2FunctionsResponsesFunction.md
index 0cf6d70..2782783 100644
--- a/docs/AppApiRestV2FunctionsResponsesFunction.md
+++ b/docs/AppApiRestV2FunctionsResponsesFunction.md
@@ -6,7 +6,7 @@ Function schema used in function strings response.
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**function_id** | **int** |  | 
+**function_id** | **int** |  | [optional] 
 **function_vaddr** | **int** | Function virtual address | 
 
 ## Example
diff --git a/revengai/__init__.py b/revengai/__init__.py
index a67dd84..699515e 100644
--- a/revengai/__init__.py
+++ b/revengai/__init__.py
@@ -13,7 +13,7 @@
 """  # noqa: E501
 
 
-__version__ = "v2.0.4"
+__version__ = "v2.1.0"
 
 # Define package exports
 __all__ = [
diff --git a/revengai/api_client.py b/revengai/api_client.py
index 695967e..94ae10e 100644
--- a/revengai/api_client.py
+++ b/revengai/api_client.py
@@ -90,7 +90,7 @@ def __init__(
             self.default_headers[header_name] = header_value
         self.cookie = cookie
         # Set default User-Agent.
-        self.user_agent = 'OpenAPI-Generator/v2.0.4/python'
+        self.user_agent = 'OpenAPI-Generator/v2.1.0/python'
         self.client_side_validation = configuration.client_side_validation
 
     def __enter__(self):
diff --git a/revengai/configuration.py b/revengai/configuration.py
index 2773af6..637f352 100644
--- a/revengai/configuration.py
+++ b/revengai/configuration.py
@@ -529,8 +529,8 @@ def to_debug_report(self) -> str:
         return "Python SDK Debug Report:\n"\
                "OS: {env}\n"\
                "Python Version: {pyversion}\n"\
-               "Version of the API: v2.0.4\n"\
-               "SDK Package Version: v2.0.4".\
+               "Version of the API: v2.1.0\n"\
+               "SDK Package Version: v2.1.0".\
                format(env=sys.platform, pyversion=sys.version)
 
     def get_host_settings(self) -> List[HostSetting]:
diff --git a/revengai/models/app_api_rest_v2_functions_responses_function.py b/revengai/models/app_api_rest_v2_functions_responses_function.py
index c504480..143040f 100644
--- a/revengai/models/app_api_rest_v2_functions_responses_function.py
+++ b/revengai/models/app_api_rest_v2_functions_responses_function.py
@@ -17,7 +17,7 @@
 import json
 
 from pydantic import BaseModel, ConfigDict, Field, StrictInt
-from typing import Any, ClassVar, Dict, List
+from typing import Any, ClassVar, Dict, List, Optional
 from typing import Optional, Set
 from typing_extensions import Self
 
@@ -25,7 +25,7 @@ class AppApiRestV2FunctionsResponsesFunction(BaseModel):
     """
     Function schema used in function strings response.
     """ # noqa: E501
-    function_id: StrictInt
+    function_id: Optional[StrictInt] = None
     function_vaddr: StrictInt = Field(description="Function virtual address")
     __properties: ClassVar[List[str]] = ["function_id", "function_vaddr"]
 
@@ -68,6 +68,11 @@ def to_dict(self) -> Dict[str, Any]:
             exclude=excluded_fields,
             exclude_none=True,
         )
+        # set to None if function_id (nullable) is None
+        # and model_fields_set contains the field
+        if self.function_id is None and "function_id" in self.model_fields_set:
+            _dict['function_id'] = None
+
         return _dict
 
     @classmethod
diff --git a/test/test_app_api_rest_v2_functions_responses_function.py b/test/test_app_api_rest_v2_functions_responses_function.py
index 63a2c00..b3f877a 100644
--- a/test/test_app_api_rest_v2_functions_responses_function.py
+++ b/test/test_app_api_rest_v2_functions_responses_function.py
@@ -39,7 +39,6 @@ def make_instance(self, include_optional) -> AppApiRestV2FunctionsResponsesFunct
             )
         else:
             return AppApiRestV2FunctionsResponsesFunction(
-                function_id = 56,
                 function_vaddr = 56,
         )
         """