diff --git a/fastapi_jsonrpc/contrib/sentry/jrpc.py b/fastapi_jsonrpc/contrib/sentry/jrpc.py
index 8b1c5ad..7699aad 100644
--- a/fastapi_jsonrpc/contrib/sentry/jrpc.py
+++ b/fastapi_jsonrpc/contrib/sentry/jrpc.py
@@ -17,6 +17,13 @@
 _DEFAULT_TRANSACTION_NAME = "generic JRPC request"
 TransactionNameGenerator = Callable[[JsonRpcContext], str]
 
+if hasattr(sentry_sdk.tracing, 'TransactionSource'):
+    # sentry_sdk ^2.23
+    TRANSACTION_SOURCE_CUSTOM = sentry_sdk.tracing.TransactionSource.CUSTOM
+else:
+    # sentry_sdk ^2.0
+    TRANSACTION_SOURCE_CUSTOM = sentry_sdk.tracing.TRANSACTION_SOURCE_CUSTOM
+
 
 @asynccontextmanager
 async def jrpc_transaction_middleware(ctx: JsonRpcContext):
@@ -30,7 +37,7 @@ async def jrpc_transaction_middleware(ctx: JsonRpcContext):
         # this name is replaced by event processor
         name=_DEFAULT_TRANSACTION_NAME,
         op=OP.HTTP_SERVER,
-        source=sentry_sdk.tracing.TRANSACTION_SOURCE_CUSTOM,
+        source=TRANSACTION_SOURCE_CUSTOM,
         origin="manual",
     )
     with sentry_sdk.isolation_scope() as jrpc_request_scope:
@@ -98,7 +105,7 @@ def _set_initial_sampling_decision(self, sampling_context):
 
 def make_transaction_info_event_processor(ctx: JsonRpcContext, name_generator: TransactionNameGenerator) -> Callable:
     def _event_processor(event, _):
-        event["transaction_info"]["source"] = sentry_sdk.tracing.TRANSACTION_SOURCE_CUSTOM
+        event["transaction_info"]["source"] = TRANSACTION_SOURCE_CUSTOM
         if ctx.method_route is not None:
             event["transaction"] = name_generator(ctx)
 
diff --git a/tests/test_openapi.py b/tests/test_openapi.py
index 40ca5ed..dd4e73e 100644
--- a/tests/test_openapi.py
+++ b/tests/test_openapi.py
@@ -126,7 +126,7 @@ def probe(
                     'properties': {
                         'ctx': {
                             'title': 'Ctx',
-                            'anyOf': [{'type': 'object'}, {'type': 'null'}],
+                            'anyOf': [{'additionalProperties': True, 'type': 'object'}, {'type': 'null'}],
                         },
                         'loc': {
                             'items': {'anyOf': [
@@ -360,6 +360,7 @@ def probe(
                             'type': 'string',
                         },
                         'params': {
+                            'additionalProperties': True,
                             'title': 'Params',
                             'type': 'object',
                         },
@@ -427,6 +428,7 @@ def probe(
                             'type': 'string',
                         },
                         'result': {
+                            'additionalProperties': True,
                             'title': 'Result',
                             'type': 'object',
                         },
diff --git a/tests/test_openapi_dependencies.py b/tests/test_openapi_dependencies.py
index 4f81238..d825a51 100644
--- a/tests/test_openapi_dependencies.py
+++ b/tests/test_openapi_dependencies.py
@@ -158,7 +158,7 @@ def test_basic(app_client, openapi_compatible):
                     'properties': {
                         'ctx': {
                             'title': 'Ctx',
-                            'anyOf': [{'type': 'object'}, {'type': 'null'}],
+                            'anyOf': [{'additionalProperties': True, 'type': 'object'}, {'type': 'null'}],
                         },
                         'loc': {
                             'items': {'anyOf': [
@@ -502,6 +502,7 @@ def test_basic(app_client, openapi_compatible):
                             'type': 'string',
                         },
                         'result': {
+                            'additionalProperties': True,
                             'title': 'Result',
                             'type': 'object',
                         },
diff --git a/tests/test_params.py b/tests/test_params.py
index 52a9083..9667b0f 100644
--- a/tests/test_params.py
+++ b/tests/test_params.py
@@ -157,7 +157,7 @@ def test_openapi(app_client, openapi_compatible):
                     'properties': {
                         'ctx': {
                             'title': 'Ctx',
-                            'anyOf': [{'type': 'object'}, {'type': 'null'}],
+                            'anyOf': [{'additionalProperties': True, 'type': 'object'}, {'type': 'null'}],
                         },
                         'loc': {
                             'items': {'anyOf': [
@@ -371,6 +371,7 @@ def test_openapi(app_client, openapi_compatible):
                             'type': 'string',
                         },
                         'params': {
+                            'additionalProperties': True,
                             'title': 'Params',
                             'type': 'object',
                         },
@@ -438,6 +439,7 @@ def test_openapi(app_client, openapi_compatible):
                             'type': 'string',
                         },
                         'result': {
+                            'additionalProperties': True,
                             'title': 'Result',
                             'type': 'object',
                         },
diff --git a/tests/test_shared_model.py b/tests/test_shared_model.py
index 2753db5..596130e 100644
--- a/tests/test_shared_model.py
+++ b/tests/test_shared_model.py
@@ -181,7 +181,7 @@ def test_openapi(app_client, openapi_compatible):
                     'properties': {
                         'ctx': {
                             'title': 'Ctx',
-                            'anyOf': [{'type': 'object'}, {'type': 'null'}],
+                            'anyOf': [{'additionalProperties': True, 'type': 'object'}, {'type': 'null'}],
                         },
                         'loc': {
                             'items': {'anyOf': [
@@ -418,6 +418,7 @@ def test_openapi(app_client, openapi_compatible):
                             'type': 'string',
                         },
                         'params': {
+                            'additionalProperties': True,
                             'title': 'Params',
                             'type': 'object',
                         },
@@ -521,6 +522,7 @@ def test_openapi(app_client, openapi_compatible):
                             'type': 'string',
                         },
                         'result': {
+                            'additionalProperties': True,
                             'title': 'Result',
                             'type': 'object',
                         },