diff --git a/rust-num-iter.spec b/rust-num-iter.spec
index b8da690..b41c671 100644
--- a/rust-num-iter.spec
+++ b/rust-num-iter.spec
@@ -6,7 +6,7 @@
 
 Name:           rust-%{crate}
 Version:        0.1.39
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        External iterators for generic mathematics
 
 # Upstream license specification: MIT/Apache-2.0
@@ -95,6 +95,9 @@ which use "std" feature of "%{crate}" crate.
 %endif
 
 %changelog
+* Fri Jul 26 2019 Fedora Release Engineering <releng@fedoraproject.org> - 0.1.39-4
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild
+
 * Sat Jun 22 12:52:09 CEST 2019 Igor Gnatenko <ignatenkobrain@fedoraproject.org> - 0.1.39-3
 - Regenerate