diff --git a/temporalio/workflow.py b/temporalio/workflow.py
index e561a45ad..72e42e2fb 100644
--- a/temporalio/workflow.py
+++ b/temporalio/workflow.py
@@ -7,6 +7,7 @@
 import inspect
 import logging
 import threading
+import typing
 import uuid
 import warnings
 from abc import ABC, abstractmethod
@@ -1919,7 +1920,10 @@ def _assert_dynamic_handler_args(
         not arg_types
         or len(arg_types) != 2
         or arg_types[0] != str
-        or arg_types[1] != Sequence[temporalio.common.RawValue]
+        or (
+            arg_types[1] != Sequence[temporalio.common.RawValue]
+            and arg_types[1] != typing.Sequence[temporalio.common.RawValue]
+        )
     ):
         raise RuntimeError(
             "Dynamic handler must have 3 arguments: self, str, and Sequence[temporalio.common.RawValue]"
diff --git a/tests/test_workflow.py b/tests/test_workflow.py
index becb0d111..f46775975 100644
--- a/tests/test_workflow.py
+++ b/tests/test_workflow.py
@@ -1,5 +1,6 @@
 import inspect
 import itertools
+import typing
 from collections.abc import Callable, Sequence
 from typing import Any, Set, Type, get_type_hints
 
@@ -70,6 +71,27 @@ def update3(self, name: str, args: Sequence[RawValue]):
         pass
 
 
+@workflow.defn()
+class GoodDefnDeprecatedTypes(GoodDefnBase):
+    # Just having the definition here is enough to confirm the signatures
+    # do not trigger a RuntimeError
+    @workflow.run
+    async def run(self, name: str) -> str:
+        raise NotImplementedError
+
+    @workflow.signal(dynamic=True)
+    def signal(self, name: str, args: typing.Sequence[RawValue]):
+        pass
+
+    @workflow.query(dynamic=True)
+    def query(self, name: str, args: typing.Sequence[RawValue]):
+        pass
+
+    @workflow.update(dynamic=True)
+    def update(self, name: str, args: typing.Sequence[RawValue]):
+        pass
+
+
 def test_workflow_defn_good():
     # Although the API is internal, we want to check the literal definition just
     # in case
diff --git a/uv.lock b/uv.lock
index 92edd6f73..76ce83f28 100644
--- a/uv.lock
+++ b/uv.lock
@@ -2976,7 +2976,7 @@ requires-dist = [
     { name = "grpcio", marker = "extra == 'grpc'", specifier = ">=1.48.2,<2" },
     { name = "mcp", marker = "extra == 'openai-agents'", specifier = ">=1.9.4,<2" },
     { name = "nexus-rpc", specifier = "==1.3.0" },
-    { name = "openai-agents", marker = "extra == 'openai-agents'", specifier = ">=0.6.3,<0.7" },
+    { name = "openai-agents", marker = "extra == 'openai-agents'", specifier = ">=0.3,<0.7" },
     { name = "opentelemetry-api", marker = "extra == 'opentelemetry'", specifier = ">=1.11.1,<2" },
     { name = "opentelemetry-sdk", marker = "extra == 'opentelemetry'", specifier = ">=1.11.1,<2" },
     { name = "protobuf", specifier = ">=3.20,<7.0.0" },
@@ -2996,8 +2996,8 @@ dev = [
     { name = "maturin", specifier = ">=1.8.2" },
     { name = "mypy", specifier = "==1.18.2" },
     { name = "mypy-protobuf", specifier = ">=3.3.0,<4" },
-    { name = "openai-agents", marker = "python_full_version >= '3.14'", specifier = ">=0.6.3,<0.7" },
-    { name = "openai-agents", extras = ["litellm"], marker = "python_full_version < '3.14'", specifier = ">=0.6.3,<0.7" },
+    { name = "openai-agents", marker = "python_full_version >= '3.14'", specifier = ">=0.3,<0.7" },
+    { name = "openai-agents", extras = ["litellm"], marker = "python_full_version < '3.14'", specifier = ">=0.3,<0.7" },
     { name = "psutil", specifier = ">=5.9.3,<6" },
     { name = "pydocstyle", specifier = ">=6.3.0,<7" },
     { name = "pydoctor", specifier = ">=25.10.1,<26" },