diff --git a/src/claude_agent_sdk/client.py b/src/claude_agent_sdk/client.py
index fc7b6754..7af8f47a 100644
--- a/src/claude_agent_sdk/client.py
+++ b/src/claude_agent_sdk/client.py
@@ -61,12 +61,14 @@ class ClaudeSDKClient:
 
     def __init__(
         self,
-        options: ClaudeAgentOptions | None = None,
+        options: ClaudeAgentOptions | dict[str, Any] | None = None,
         transport: Transport | None = None,
     ):
         """Initialize Claude SDK client."""
         if options is None:
             options = ClaudeAgentOptions()
+        elif isinstance(options, dict):
+            options = ClaudeAgentOptions(**options)
         self.options = options
         self._custom_transport = transport
         self._transport: Transport | None = None
diff --git a/src/claude_agent_sdk/query.py b/src/claude_agent_sdk/query.py
index 98ed0c1c..b7923a7c 100644
--- a/src/claude_agent_sdk/query.py
+++ b/src/claude_agent_sdk/query.py
@@ -12,7 +12,7 @@
 async def query(
     *,
     prompt: str | AsyncIterable[dict[str, Any]],
-    options: ClaudeAgentOptions | None = None,
+    options: ClaudeAgentOptions | dict[str, Any] | None = None,
     transport: Transport | None = None,
 ) -> AsyncIterator[Message]:
     """
@@ -115,6 +115,8 @@ class MyCustomTransport(Transport):
     """
     if options is None:
         options = ClaudeAgentOptions()
+    elif isinstance(options, dict):
+        options = ClaudeAgentOptions(**options)
 
     os.environ["CLAUDE_CODE_ENTRYPOINT"] = "sdk-py"