diff --git a/.gitignore b/.gitignore
index 5bd5a63..3734f7e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -29,3 +29,4 @@
 /yosys-51dd029.tar.gz
 /yosys-d82bae3.tar.gz
 /yosys-5813809.tar.gz
+/yosys-b04d0e0.tar.gz
diff --git a/sources b/sources
index 2ea31be..bcee2de 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-SHA512 (yosys-5813809.tar.gz) = a92b4eb2471330c2673cca988474f3149b5b688203ea9b167b161a1d00fecfa1c3c5bfd15b70968e96adeb05373e3ceff1b5346cc84df710844a115bdfe4a8f2
+SHA512 (yosys-b04d0e0.tar.gz) = 338135e797643e565998bad63d92cd277c0a370183bdb11486b1a0e1c4d48279a407f5d5ba69ce332fb2bf77b923920706e21b752f9040d5a51d19d42e5d5095
 SHA512 (yosys_0.9-1.debian.tar.xz) = d9df5637efc730b2b681daa8a5933803dba70dca5b31fe4ac13601032eccd9105c001563cf627fbdd2d4ebad8551f2647e882fbf107a7df98badb2d200e2b4dc
diff --git a/yosys.spec b/yosys.spec
index 8f51acc..fa8cb64 100644
--- a/yosys.spec
+++ b/yosys.spec
@@ -1,12 +1,12 @@
-%global commit0 5813809ad9afbe1c38f65c6aae7c3441d7614d0b
+%global commit0 b04d0e09e83102e14a53bb8b8dcc8c35f63b2fbe
 %global shortcommit0 %%(c=%%{commit0}; echo ${c:0:7})
 
-%global snapdate 20230607
+%global snapdate 20230729
 
 %global __python %{__python3}
 
 Name:           yosys
-Version:        0.30
+Version:        0.31
 Release:        1.%{snapdate}git%{shortcommit0}%{?dist}
 Summary:        Yosys Open SYnthesis Suite, including Verilog synthesizer
 License:        ISC and MIT
@@ -172,6 +172,12 @@ make test ABCEXTERNAL=%{_bindir}/abc SEED=314159265359
 
 
 %changelog
+* Sat Jul 29 2023 Gabriel Somlo <gsomlo@gmail.com> - 0.31.1.20230729gitb04d0e0
+- update to 0.31 snapshot
+
+* Sat Jul 22 2023 Fedora Release Engineering <releng@fedoraproject.org> - 0.30-2.20230607git5813809
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild
+
 * Wed Jun 07 2023 Gabriel Somlo <gsomlo@gmail.com> - 0.30.1.20230607git5813809
 - update to 0.30 snapshot