diff --git a/CCfits.spec b/CCfits.spec
index fc1c0d1..f63e263 100644
--- a/CCfits.spec
+++ b/CCfits.spec
@@ -1,6 +1,6 @@
 Name: CCfits
 Version: 2.5
-Release: 3%{?dist}
+Release: 4%{?dist}
 Summary: A C++ interface for cfitsio
 
 Group: Development/Libraries
@@ -67,6 +67,9 @@ make %{?_smp_mflags}  install DESTDIR=%{buildroot}
 %doc html
 
 %changelog
+* Wed Jul 26 2017 Fedora Release Engineering <releng@fedoraproject.org> - 2.5-4
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Mass_Rebuild
+
 * Fri Feb 10 2017 Fedora Release Engineering <releng@fedoraproject.org> - 2.5-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild