diff --git a/verilog.spec b/verilog.spec
index 97a0e3c1a..770160a3b 100644
--- a/verilog.spec
+++ b/verilog.spec
@@ -1,6 +1,6 @@
 #norootforbuild
 #
-%define rev_date 20150815
+%define rev_date 20201003
 # Normally, the suff-ix is %nil, meaning the suffix is to not be used.
 # But if the builder wants to make a suffixed package, he may set this
 # to a value (i.e. -test) to cause suffixes to be put in all the right
@@ -10,7 +10,7 @@
 #
 Summary: Icarus Verilog
 Name: verilog%{suff}
-Version: 11.0.%{rev_date}
+Version: 12.0.%{rev_date}
 Release: 0
 License: GPL
 Group: Productivity/Scientific/Electronics
diff --git a/version_base.h b/version_base.h
index 39a3fa0b9..a17ed5cfe 100644
--- a/version_base.h
+++ b/version_base.h
@@ -3,7 +3,7 @@
  * Edit this definition in version_base.in to define the base version
  * number for the compiled result.
  */
-# define VERSION_MAJOR  11
+# define VERSION_MAJOR  12
 # define VERSION_MINOR   0
 
 /*