diff --git a/cmd/mtredisalize/parser.go b/cmd/mtredisalize/parser.go
index e54afa3..bd38351 100644
--- a/cmd/mtredisalize/parser.go
+++ b/cmd/mtredisalize/parser.go
@@ -13,6 +13,8 @@ import (
 	"strconv"
 )
 
+const maxBulkStringSize = 8 * 1024 * 1024
+
 type RedisConsumer interface {
 	ConsumeInteger(int64) bool
 	ConsumeArray(int64) bool
@@ -92,7 +94,7 @@ func (rp *RedisParser) bulkString(line []byte) bool {
 	case i == 0:
 		return rp.consumer.ConsumeBulkString([]byte{})
 	default:
-		if i >= 4*1024*1024 { // 4MB should be sufficient
+		if i > maxBulkStringSize { // prevent denial of service.
 			return rp.consumer.ConsumeError(
 				fmt.Errorf("Bulk string too large (%d bytes).\n", i))
 		}