update history
diff --git a/readme.md b/readme.md
index 1a08caf..4c01c3c 100644
--- a/readme.md
+++ b/readme.md
@@ -1,5 +1,5 @@
-Xbyak 4.90 ; JIT assembler for x86(IA32), x64(AMD64, x86-64) by C++
+Xbyak 4.901 ; JIT assembler for x86(IA32), x64(AMD64, x86-64) by C++
=============
Abstract
@@ -285,6 +285,7 @@
History
-------------
+* 2016/May/14 ver 4.901 comment to ready() function(thanks to skmp)
* 2016/Feb/04 ver 4.90 add jcc(const void *addr);
* 2016/Jan/30 ver 4.89 vpblendvb supports ymm reg(thanks to John Funnell)
* 2016/Jan/24 ver 4.88 lea, cmov supports 16-bit register(thanks to whyisthisfieldhere)
diff --git a/readme.txt b/readme.txt
index 2af4d2f..fb569c9 100644
--- a/readme.txt
+++ b/readme.txt
@@ -1,5 +1,5 @@
- C++用x86(IA-32), x64(AMD64, x86-64) JITアセンブラ Xbyak 4.90
+ C++用x86(IA-32), x64(AMD64, x86-64) JITアセンブラ Xbyak 4.901
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◎概要
@@ -301,6 +301,7 @@
-----------------------------------------------------------------------------
◎履歴
+2016/03/14 ver 4.90 ready()関数にコメント加筆(thanks to skmp)
2016/02/04 ver 4.90 条件分岐命令にjcc(const void *addr);のタイプを追加
2016/01/30 ver 4.89 vpblendvbがymmレジスタをサポートしていなかった(thanks to John Funnell)
2016/01/24 ver 4.88 lea, cmovの16bitレジスタ対応(thanks to whyisthisfieldhere)
