diff --git a/pyproject.toml b/pyproject.toml
index 452d673..9d1f79a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,7 +36,7 @@ classifiers = [
 
 dependencies = [
     "pydantic>=2.0",
-    "litellm>=1.40.0",
+    "litellm>=1.91.0",
 ]
 
 [project.scripts]