diff --git a/src/entry/Maat_command.cpp b/src/entry/Maat_command.cpp
index ec14be0..c4bd47c 100644
--- a/src/entry/Maat_command.cpp
+++ b/src/entry/Maat_command.cpp
@@ -1681,6 +1681,8 @@ int redis_flush_DB(redisContext* ctx, int db_index, void* logger)
 	append_cmd_cnt++;
 	redisAppendCommand(ctx,"SET MAAT_VERSION %lld",maat_redis_version);
 	append_cmd_cnt++;
+	redisAppendCommand(ctx,"SET MAAT_PRE_VER %lld",maat_redis_version);
+	append_cmd_cnt++;
 	redisAppendCommand(ctx,"SET SEQUENCE_REGION 1",maat_redis_version);
 	append_cmd_cnt++;
 	redisAppendCommand(ctx,"SET SEQUENCE_GROUP 1",maat_redis_version);
diff --git a/src/entry/Maat_rule.cpp b/src/entry/Maat_rule.cpp
index e1d1a41..09d1c05 100644
--- a/src/entry/Maat_rule.cpp
+++ b/src/entry/Maat_rule.cpp
@@ -30,7 +30,7 @@
 #include "stream_fuzzy_hash.h"
 #include "gram_index_engine.h"
 
-int MAAT_FRAME_VERSION_2_2_20180524=1;
+int MAAT_FRAME_VERSION_2_2_20180529=1;
 
 const char* CHARSET_STRING[]={"NONE","gbk","big5","unicode","utf8","bin",
 							"unicode_ascii_esc","unicode_ascii_aligned","unicode_ncr_dec","unicode_ncr_hex","url_encode_gb2312","url_encode_utf8",""};