diff --git a/.gitignore b/.gitignore
index eea2497..bbdd147 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,3 +16,4 @@
 /yosys-c312402.tar.gz
 /yosys-4da3f28.tar.gz
 /yosys-587e09d.tar.gz
+/yosys-b15a46c.tar.gz
diff --git a/sources b/sources
index 8761816..20e25da 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-SHA512 (yosys-587e09d.tar.gz) = 5cafa2dab54a93a2142f632c84900eee48049405bdbd04f09cd21ff580cd1070173906c40b37f56257535ec3b09935ed81f0783b45b72153f5179fc001d0a1a0
+SHA512 (yosys-b15a46c.tar.gz) = 115ca56cbb7cce7c863ead599394441146d7770f5af3ee238dda82524465040d9868c80c6258e11deeab6c8fda3ed818ac5a3f9453102e39c1f6b969b5dd0b75
 SHA512 (yosys_0.9-1.debian.tar.xz) = d9df5637efc730b2b681daa8a5933803dba70dca5b31fe4ac13601032eccd9105c001563cf627fbdd2d4ebad8551f2647e882fbf107a7df98badb2d200e2b4dc
diff --git a/yosys.spec b/yosys.spec
index 6b4fe9d..6097b27 100644
--- a/yosys.spec
+++ b/yosys.spec
@@ -1,12 +1,12 @@
-%global commit0 587e09d551d753d6c9a3ca3635e2c7f66e978024
+%global commit0 b15a46c2c0bf79445d3f0ba0ec80303080d33cfe
 %global shortcommit0 %%(c=%%{commit0}; echo ${c:0:7})
 
-%global snapdate 20220509
+%global snapdate 20220611
 
 %global __python %{__python3}
 
 Name:           yosys
-Version:        0.17
+Version:        0.18
 Release:        1.%{snapdate}git%{shortcommit0}%{?dist}
 Summary:        Yosys Open SYnthesis Suite, including Verilog synthesizer
 License:        ISC and MIT
@@ -171,6 +171,9 @@ make test ABCEXTERNAL=%{_bindir}/abc SEED=314159265359
 
 
 %changelog
+* Sat Jun 11 2022 Gabriel Somlo <gsomlo@gmail.com> - 0.18.1.20220611gitb15a46c
+- update to 0.18 snapshot
+
 * Mon May 09 2022 Gabriel Somlo <gsomlo@gmail.com> - 0.17.1.20220509git587e09d
 - update to 0.17 snapshot