diff --git a/ChangeLog b/ChangeLog
index fe10eed80f..8767538393 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu Aug 18 09:26:52 2016  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
+
+	* gems/bundled_gems: bump to test-unit-3.2.1
+
 Thu Aug 18 02:36:26 2016  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* tool/rbinstall.rb: skip gems which failed to build extensions.
diff --git a/gems/bundled_gems b/gems/bundled_gems
index 859cb6d40d..1bbec050bc 100644
--- a/gems/bundled_gems
+++ b/gems/bundled_gems
@@ -1,5 +1,5 @@
 power_assert 0.3.0
-test-unit 3.2.0
+test-unit 3.2.1
 minitest 5.9.0
 rake 11.2.2
 net-telnet 0.1.1