diff --git a/avr-libc.spec b/avr-libc.spec
index 38143f9..0bfd463 100644
--- a/avr-libc.spec
+++ b/avr-libc.spec
@@ -7,7 +7,7 @@
 
 Name:           avr-libc
 Version:        2.0.0
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        C library for use with GCC on Atmel AVR microcontrollers
 Group:          Development/Tools
 License:        BSD
@@ -144,6 +144,9 @@ rm -rf $RPM_BUILD_ROOT
 %doc %{_docdir}/%{name}/%{name}*.pdf
 
 %changelog
+* Wed Jul 26 2017 Fedora Release Engineering <releng@fedoraproject.org> - 2.0.0-4
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Mass_Rebuild
+
 * Fri Feb 10 2017 Fedora Release Engineering <releng@fedoraproject.org> - 2.0.0-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild