diff --git a/CHANGELOG.md b/CHANGELOG.md
index bc4d9702..40bcdb07 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,10 +1,13 @@
 # Change log
 
-## Current version
+## 0.3.12
 
 * **Breaking change!**
 The `petscr`, `petscrjp` and `atasciiscr` encodings now use $E0 and $DB respectively as their string terminator.
 
+* **Potentially breaking change!**
+Changed the identifiers for various subtypes of the 65C02 processors.
+
 * Added `nullchar_scr` and `NULLCHAR_SCR` 
 
 * Added the `scrstring` module
diff --git a/README.md b/README.md
index 09e1b8a1..9721d0ae 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 A middle-level programming language targeting 6502-based, 8080-based and Z80-based microcomputers. 
 
 For binary releases, see: [https://github.com/KarolS/millfork/releases](https://github.com/KarolS/millfork/releases)
-(latest: 0.3.10).  
+(latest: 0.3.12).  
 For build instructions, see [Build instructions](./COMPILING.md).
 
 ## Features
diff --git a/build.sbt b/build.sbt
index 9dd44d57..7ca06734 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,6 +1,6 @@
 name := "millfork"
 
-version := "0.3.11-SNAPSHOT"
+version := "0.3.12"
 
 scalaVersion := "2.12.10"