diff --git a/openbabel.spec b/openbabel.spec
index 04d1b5c..0ffa5dd 100644
--- a/openbabel.spec
+++ b/openbabel.spec
@@ -10,7 +10,7 @@
 
 Name: openbabel
 Version: 2.4.1
-Release: 32%{?dist}
+Release: 33%{?dist}
 Summary: Chemistry software file format converter
 License: GPLv2
 URL: https://openbabel.org/
@@ -246,6 +246,9 @@ export CTEST_OUTPUT_ON_FAILURE=1 PYTHONPATH=%{buildroot}%{python3_sitearch}
 %{ruby_vendorarchdir}/openbabel.so
 
 %changelog
+* Wed Jan 06 2021 Mamoru TASAKA <mtasaka@fedoraproject.org> - 2.4.1-33
+- F-34: rebuild against ruby 3.0
+
 * Thu Jul 30 2020 Rex Dieter <rdieter@fedoraproject.org> - 2.4.1-32
 - adjust for new %%cmake macros (#1859850)