diff --git a/mozjs38.spec b/mozjs38.spec
index 53da18e..5fe8dc4 100644
--- a/mozjs38.spec
+++ b/mozjs38.spec
@@ -3,7 +3,7 @@
 Summary:	JavaScript interpreter and libraries
 Name:		mozjs%{major}
 Version:	%{major}.8.0
-Release:	12%{?dist}
+Release:	13%{?dist}
 License:	MPLv2.0 and BSD and GPLv2+ and GPLv3+ and LGPLv2.1 and LGPLv2.1+ and AFL and ASL 2.0
 URL:		https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey/Releases/38
 Source0:	https://ftp.mozilla.org/pub/firefox/releases/%{version}esr/source/firefox-%{version}esr.source.tar.bz2
@@ -138,6 +138,9 @@ python2 tests/jstests.py -d -s --no-progress ../../js/src/js/src/shell/js -a "--
 %{_includedir}/mozjs-%{major}
 
 %changelog
+* Thu Jul 25 2019 Fedora Release Engineering <releng@fedoraproject.org> - 38.8.0-13
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild
+
 * Fri Feb 01 2019 Fedora Release Engineering <releng@fedoraproject.org> - 38.8.0-12
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild