diff --git a/VERSION.md b/VERSION.md
index f193c3db2..27c573062 100644
--- a/VERSION.md
+++ b/VERSION.md
@@ -1 +1 @@
-1.2.2854
+1.2.2866
diff --git a/yosys b/yosys
index 8e1e2b9a3..6155c59d0 160000
--- a/yosys
+++ b/yosys
@@ -1 +1 @@
-Subproject commit 8e1e2b9a39fa6eb340165bfbf87509c4df26db6b
+Subproject commit 6155c59d00125c58b4eb66f419ef6485439c0de2