diff --git a/backend/requirements-agent.txt b/backend/requirements-agent.txt
index bddbebaf..3d9f6d0c 100644
--- a/backend/requirements-agent.txt
+++ b/backend/requirements-agent.txt
@@ -13,7 +13,7 @@ pydantic_core>=2.41.0
 typing_extensions>=4.15.0
 
 # Gradio UI
-gradio>=5.50.0
+gradio>=5.50.0,<6
 python-multipart>=0.0.21
 aiofiles>=24.1.0