diff --git a/config/config.go b/config/config.go
index dac0546b9..792201a7e 100644
--- a/config/config.go
+++ b/config/config.go
@@ -830,8 +830,8 @@ func DefaultMempoolConfig() *MempoolConfig {
 		MaxTxsBytes:                  1024 * 1024 * 1024, // 1GB
 		CacheSize:                    10000,
 		MaxTxBytes:                   1024 * 1024, // 1MB
-		TTLDuration:                  0 * time.Second,
-		TTLNumBlocks:                 0,
+		TTLDuration:                  5 * time.Second,
+		TTLNumBlocks:                 10,
 		TxNotifyThreshold:            0,
 		CheckTxErrorBlacklistEnabled: false,
 		CheckTxErrorThreshold:        0,