diff --git a/COPYING b/COPYING
index 0518b5a..cf791c6 100644
--- a/COPYING
+++ b/COPYING
@@ -1,4 +1,4 @@
-Copyright (c) 2013-2014, Cybozu.
+Copyright (c) 2013-2015 Cybozu.
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
diff --git a/ChangeLog b/ChangeLog
index 06d1b36..610742a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+version 1.1.1
+
+	* New config option "secure_erase" for confidential data.
+	* New config option "lock_memory" to prevent swapping.
+
 version 1.1.0
 
 	* update documents.
diff --git a/src/constants.hpp b/src/constants.hpp
index b440412..d3f79dd 100644
--- a/src/constants.hpp
+++ b/src/constants.hpp
@@ -1,5 +1,5 @@
 // Constants used in yrmcds.
-// (C) 2013, 2014 Cybozu.
+// (C) 2013-2015 Cybozu.
 
 #ifndef YRMCDS_CONSTANTS_HPP
 #define YRMCDS_CONSTANTS_HPP
@@ -31,7 +31,7 @@ const std::size_t   MAX_REQUEST_LENGTH  = 30 << 20; // 30 MiB
 const int           MAX_SLAVES          = 5;
 const int           MAX_CONSECUTIVE_GCS = 3;
 
-const char          VERSION[] = "yrmcds version 1.1.0";
+const char          VERSION[] = "yrmcds version 1.1.1";
 
 } // namespace yrmcds