diff --git a/lmfit.spec b/lmfit.spec
index a75d2aa..d632314 100644
--- a/lmfit.spec
+++ b/lmfit.spec
@@ -1,6 +1,6 @@
 Name:           lmfit
 Version:        6.1
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        Levenberg-Marquardt least-squares minimization and curve fitting
 # software is BSD, documentation is CC-BY
 License:        BSD and CC-BY
@@ -49,6 +49,9 @@ mv -f _demo demo
 %{_mandir}/man7/*
 
 %changelog
+* Wed Jul 26 2017 Fedora Release Engineering <releng@fedoraproject.org> - 6.1-4
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Mass_Rebuild
+
 * Fri Feb 10 2017 Fedora Release Engineering <releng@fedoraproject.org> - 6.1-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild