diff --git a/src/MaaCopilotServer.Resources/maa-copilot-schema.json b/src/MaaCopilotServer.Resources/maa-copilot-schema.json
index 7ac8a90..27f8f5b 100644
--- a/src/MaaCopilotServer.Resources/maa-copilot-schema.json
+++ b/src/MaaCopilotServer.Resources/maa-copilot-schema.json
@@ -210,8 +210,7 @@
         },
         "cost_changes": {
           "type": "integer",
-          "description": "Waiting until the cost changes for the amount specified, optional, 0 by default.",
-          "minimum": 0
+          "description": "Waiting until the cost changes for the amount specified, optional, 0 by default."
         },
         "cooling": {
           "type": "integer",