diff --git a/python/openai_harmony/__init__.py b/python/openai_harmony/__init__.py
index c8bce8f..7a9a079 100644
--- a/python/openai_harmony/__init__.py
+++ b/python/openai_harmony/__init__.py
@@ -29,7 +29,7 @@
 )
 
 import re
-from pydantic import BaseModel, Field
+from pydantic import BaseModel, ConfigDict, Field
 
 # Re-export the low-level Rust bindings under a private name so that we can
 # keep the *public* namespace clean and purely Pythonic.
@@ -179,6 +179,7 @@ def python() -> "ToolNamespaceConfig":
 
 
 class SystemContent(Content):
+    model_config = ConfigDict(protected_namespaces=("model_validate", "model_dump"))
     model_identity: Optional[str] = (
         "You are ChatGPT, a large language model trained by OpenAI."
     )