diff --git a/ChangeLog b/ChangeLog
index 3a836c3460..388a865ca5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+Thu Mar 28 13:42:55 2018  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
+
+	[DOC] IO.new accepts external_encoding
+
+	Revert part of r61278 [Bug #13655]
+	[ci skip]
+
+Thu Mar 28 13:42:55 2018  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	IO.new doesn't receive "-" as external_encoding [Bug #13655]
+
 Thu Mar 22 15:38:43 2018  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	Removed the obstacle to running test-all with VC14.
diff --git a/io.c b/io.c
index 524f7d62ef..ef11bda8c6 100644
--- a/io.c
+++ b/io.c
@@ -7558,8 +7558,7 @@ rb_io_make_open_file(VALUE obj)
  *    If +mode+ parameter is given, this parameter will be bitwise-ORed.
  *
  *  :\external_encoding ::
- *    External encoding for the IO.  "-" is a synonym for the default external
- *    encoding.
+ *    External encoding for the IO.
  *
  *  :\internal_encoding ::
  *    Internal encoding for the IO.  "-" is a synonym for the default internal
diff --git a/version.h b/version.h
index 9257e54d9b..fdb2e569ab 100644
--- a/version.h
+++ b/version.h
@@ -1,10 +1,10 @@
 #define RUBY_VERSION "2.3.7"
-#define RUBY_RELEASE_DATE "2018-03-22"
-#define RUBY_PATCHLEVEL 433
+#define RUBY_RELEASE_DATE "2018-03-28"
+#define RUBY_PATCHLEVEL 434
 
 #define RUBY_RELEASE_YEAR 2018
 #define RUBY_RELEASE_MONTH 3
-#define RUBY_RELEASE_DAY 22
+#define RUBY_RELEASE_DAY 28
 
 #include "ruby/version.h"