diff --git a/.gitignore b/.gitignore
index 4e52299..da60ebd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 /contracts-0.14.0.gem
+/contracts-0.15.0.gem
diff --git a/rubygem-contracts.spec b/rubygem-contracts.spec
index ba3127e..6e16d4f 100644
--- a/rubygem-contracts.spec
+++ b/rubygem-contracts.spec
@@ -1,8 +1,8 @@
 %global	gem_name	contracts
 
 Name:		rubygem-%{gem_name}
-Version:	0.14.0
-Release:	3%{?dist}
+Version:	0.15.0
+Release:	1%{?dist}
 
 Summary:	Contracts for Ruby
 License:	BSD
@@ -79,6 +79,9 @@ popd
 %{gem_instdir}/benchmarks/
 
 %changelog
+* Fri Mar 17 2017 Mamoru TASAKA <mtasaka@fedoraproject.org> - 0.15.0-1
+- 0.15.0
+
 * Sat Feb 11 2017 Fedora Release Engineering <releng@fedoraproject.org> - 0.14.0-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild
 
diff --git a/sources b/sources
index 7f935ce..c060253 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-777951bee79388afa0ed826e063c8886  contracts-0.14.0.gem
+SHA512 (contracts-0.15.0.gem) = ff478fef19298842f3632cb19b2c119052e271f41fd7e910da64dc061734b9fc6dd10f0a90e15b1d9150d8e26e982785b5a96aa9a093c10b16030235a37442e4