diff --git a/dolfin.spec b/dolfin.spec
index 6196a05..18d49f2 100644
--- a/dolfin.spec
+++ b/dolfin.spec
@@ -2,7 +2,7 @@
 Name:		dolfin
 Version:	2019.1.0.post0
 %global fenics_version 2019.1
-Release:        19%{?dist}
+Release:        20%{?dist}
 Summary:        FEniCS computational backend and problem solving environment
 
 License:        LGPLv3+
@@ -168,6 +168,9 @@ ctest -V %{?_smp_mflags}
 %{python3_sitearch}/fenics_dolfin-%{fenics_version}*-py%{python3_version}.egg-info/
 
 %changelog
+* Fri Aug 06 2021 Jonathan Wakely <jwakely@redhat.com> - 2019.1.0.post0-20
+- Rebuilt for Boost 1.76
+
 * Wed Jul 21 2021 Fedora Release Engineering <releng@fedoraproject.org> - 2019.1.0.post0-19
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_35_Mass_Rebuild