diff --git a/rust-rand_core.spec b/rust-rand_core.spec
index e7972a7..4cca867 100644
--- a/rust-rand_core.spec
+++ b/rust-rand_core.spec
@@ -6,7 +6,7 @@
 
 Name:           rust-%{crate}
 Version:        0.4.0
-Release:        5%{?dist}
+Release:        6%{?dist}
 Summary:        Core random number generator traits and tools for implementation
 
 # Upstream license specification: MIT/Apache-2.0
@@ -131,6 +131,9 @@ which use "std" feature of "%{crate}" crate.
 %endif
 
 %changelog
+* Fri Jul 26 2019 Fedora Release Engineering <releng@fedoraproject.org> - 0.4.0-6
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild
+
 * Thu Jun 20 12:00:23 CEST 2019 Igor Gnatenko <ignatenkobrain@fedoraproject.org> - 0.4.0-5
 - Regenerate