diff --git a/pyproject.toml b/pyproject.toml
index 00c3e01d..651408c4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,7 +42,7 @@ dependencies = [
     "litellm>=1.77.0",
     "pydantic>=2.11.7",
     "pydantic-settings>=2.10.1",
-    "pydantic-ai>=1.0.6",
+    "pydantic-ai>=2.0,<3.0",
     "requests>=2.32.4",
     "python-dotenv>=1.1.1",
     "rich>=14.1.0",
diff --git a/requirements.txt b/requirements.txt
index 5b770d9a..993722f3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -105,8 +105,8 @@ pyasn1_modules==0.4.2
 pycares==4.11.0
 pycparser==2.23
 pydantic==2.11.7
-pydantic-ai>=1.37.0
-pydantic-ai-slim>=1.37.0
+pydantic-ai>=2.0,<3.0
+pydantic-ai-slim>=2.0,<3.0
 pydantic-evals>=1.37.0
 pydantic-graph>=1.37.0
 pydantic-settings==2.10.1