diff --git a/src/main/java/com/moilioncircle/redis/replicator/Configuration.java b/src/main/java/com/moilioncircle/redis/replicator/Configuration.java
index 12f138de..06574732 100644
--- a/src/main/java/com/moilioncircle/redis/replicator/Configuration.java
+++ b/src/main/java/com/moilioncircle/redis/replicator/Configuration.java
@@ -61,7 +61,7 @@ public static Configuration defaultSetting() {
     /**
      * redis input stream buffer size
      */
-    private int bufferSize = 8192;
+    private int bufferSize = 1024 * 1024;
 
     /**
      * auth password