diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 30e5437..b4aaeae 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -16,7 +16,7 @@ dependencies = [
     "jinja2>=3.1.6",
     "cryptography>=46.0.7",
     "keyring>=25.7.0",
-    "pydantic-ai>=1.98,<1.99",
+    "pydantic-ai>=2.7.0,<2.8",
 ]
 
 [project.optional-dependencies]