diff --git a/pyproject.toml b/pyproject.toml
index 707581846..09308478a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,7 +26,7 @@ dependencies = [
   "docstring-parser>=0.16",
   "faiss-cpu==1.10.0",
   "filelock>=3.18.0",
-  "google-genai>=1.14.0",
+  "google-genai>=1.14.0, <1.51.0",
   "lark-oapi>=1.4.15",
   "lxml-html-clean>=0.4.2",
   "mcp>=1.8.0",