diff --git a/requirements.txt b/requirements.txt
index f92e2ec3a..ade8cf9fc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ colorlog==4.7.2
 colorama==0.4.4
 tensorboard>=2.5.0
 thop>=0.1.1.post2207130030
-ray>=1.13.0
+ray>=1.13.0, <=2.6.3
 tabulate>=0.8.10 
 plotly>=4.0.0
 texttable>=0.9.0
\ No newline at end of file