diff --git a/smoldyn.spec b/smoldyn.spec
index e9dd02a..b9e5925 100644
--- a/smoldyn.spec
+++ b/smoldyn.spec
@@ -17,7 +17,7 @@
 Name:  smoldyn
 Summary: A particle-based spatial stochastic simulator
 Version: 2.61
-Release: 5%{?dist}
+Release: 6%{?dist}
 
 # The rxnparam.c and SurfaceParam.c source code files are in the public domain.
 #
@@ -188,6 +188,9 @@ popd
 %doc documentation/*
 
 %changelog
+* Wed Jan 27 2021 Fedora Release Engineering <releng@fedoraproject.org> - 2.61-6
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild
+
 * Wed Jul 29 2020 Fedora Release Engineering <releng@fedoraproject.org> - 2.61-5
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild