diff --git a/rust-number_prefix.spec b/rust-number_prefix.spec
index bb11c5d..46497e9 100644
--- a/rust-number_prefix.spec
+++ b/rust-number_prefix.spec
@@ -6,7 +6,7 @@
 
 Name:           rust-%{crate}
 Version:        0.3.0
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        Library for formatting numeric prefixes: kilo, giga, kibi
 
 # Upstream license specification: MIT
@@ -83,6 +83,9 @@ which use "std" feature of "%{crate}" crate.
 %endif
 
 %changelog
+* Fri Jul 26 2019 Fedora Release Engineering <releng@fedoraproject.org> - 0.3.0-4
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild
+
 * Sun Jul 14 18:20:58 CEST 2019 Igor Gnatenko <ignatenkobrain@fedoraproject.org> - 0.3.0-3
 - Regenerate