diff --git a/pyproject.toml b/pyproject.toml
index 2c1cb49..3b590b5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ dependencies = [
     "httpx>=0.27",
     "anthropic>=0.40",
     "openai>=1.50",
-    "pydantic>=2.6",
+    "pydantic>=2.13.5",
 ]
 
 license = { text = "Apache-2.0" }