diff --git a/params/config.go b/params/config.go
index 0a0a63ea5c..01904c794b 100644
--- a/params/config.go
+++ b/params/config.go
@@ -114,9 +114,9 @@ var (
 			SwitchRound:          0,
 			CertThreshold:        0.667,
 			TimeoutSyncThreshold: 3,
-			TimeoutPeriod:        30,
+			TimeoutPeriod:        5,
 			MinePeriod:           2,
-			ExpTimeoutConfig:     ExpTimeoutConfig{Base: 1.0, MaxExponent: 0},
+			ExpTimeoutConfig:     ExpTimeoutConfig{Base: 2.0, MaxExponent: 5},
 		},
 	}