diff --git a/ChangeLog b/ChangeLog
index 40ab4723de..a589945ef2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sun Nov  9 11:25:11 2014  Kazuki Tsujimoto  <kazuki@callcc.net>
+
+	* gems/bundled_gems: upgraded to power_assert 0.2.0.
+
 Sun Nov  9 10:31:03 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* lib/securerandom.rb: set the script encoding to make a string
diff --git a/gems/bundled_gems b/gems/bundled_gems
index 07cc468a75..9c60dd5095 100644
--- a/gems/bundled_gems
+++ b/gems/bundled_gems
@@ -1,3 +1,3 @@
-power_assert 0.1.4
+power_assert 0.2.0
 test-unit 3.0.3
 minitest 5.4.2