diff --git a/src/mistralai/extra/utils/_pydantic_helper.py b/src/mistralai/extra/utils/_pydantic_helper.py
index f042c394..0702d2a4 100644
--- a/src/mistralai/extra/utils/_pydantic_helper.py
+++ b/src/mistralai/extra/utils/_pydantic_helper.py
@@ -6,7 +6,7 @@ def rec_strict_json_schema(schema_node: Any) -> Any:
     Recursively set the additionalProperties property to False for all objects in the JSON Schema.
     This makes the JSON Schema strict (i.e. no additional properties are allowed).
     """
-    if isinstance(schema_node, (str, bool)) or schema_node is None:
+    if isinstance(schema_node, (str, bool, int)) or schema_node is None:
         return schema_node
     if isinstance(schema_node, dict):
         if "type" in schema_node and schema_node["type"] == "object":