diff --git a/requirements.txt b/requirements.txt
index 6c3c59d4..c654bf78 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,3 +3,4 @@ rich==12.5.1
 ray[default]==2.5.0
 kubernetes>=25.3.0,<27
 codeflare-torchx==0.6.0.dev0
+pydantic<2 # 2.0+ broke ray[default] see detail: https://github.com/ray-project/ray/pull/37000