diff --git a/libsvm.spec b/libsvm.spec
index a17c43a..12fb238 100644
--- a/libsvm.spec
+++ b/libsvm.spec
@@ -9,7 +9,7 @@
 
 Name:           libsvm
 Version:        3.21
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        A Library for Support Vector Machines
 
 Group:          Development/Libraries
@@ -294,6 +294,9 @@ rm -rf %{buildroot}
 %{_datadir}/applications/*%{name}-svm-toy-qt.desktop
 
 %changelog
+* Wed Jul 26 2017 Fedora Release Engineering <releng@fedoraproject.org> - 3.21-4
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Mass_Rebuild
+
 * Fri Feb 10 2017 Fedora Release Engineering <releng@fedoraproject.org> - 3.21-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild