diff --git a/HISTORY.markdown b/HISTORY.markdown
index 9fc9f87..93789b6 100644
--- a/HISTORY.markdown
+++ b/HISTORY.markdown
@@ -1,10 +1,19 @@
 History of SixtyPical
 =====================
 
-0.1
+0.4
 ---
 
-Initial inspired-but-messy version implemented in Haskell.
+*   Added `repeat` loops to the language, which can repeat until a flag
+    is set (or `not` set), or which can repeat `forever`.
+*   `if not` inverts the sense of the test.
+*   Added explicitly-addressed memory locations.
+
+0.3
+---
+
+*   Added external routine declarations.
+*   Added ability to compile to 6502 machine code and output a `PRG` file.
 
 0.2
 ---
@@ -14,16 +23,7 @@ rewritten in Python.  The language was much simplified.  The aim was to get the
 analysis completely right before adding more sophisticated and useful features
 in future versions.
 
-0.3
+0.1
 ---
 
-*   Added external routine declarations.
-*   Added ability to compile to 6502 machine code and output a `PRG` file.
-
-0.4
----
-
-*   Added `repeat` loops to the language, which can repeat until a flag
-    is set (or `not` set), or which can repeat `forever`.
-*   `if not` inverts the sense of the test.
-*   Added explicitly-addressed memory locations.
+Initial inspired-but-messy version implemented in Haskell.
diff --git a/README.markdown b/README.markdown
index 5f76236..2910c6a 100644
--- a/README.markdown
+++ b/README.markdown
@@ -13,8 +13,8 @@ and suchlike.
 
 It is a **work in progress**, currently at the **proof-of-concept** stage.
 
-The current released version of SixtyPical is 0.3.  The current development
-version of SixtyPical, unreleased as of this writing, is 0.4-PRE.
+The current released version of SixtyPical is 0.4.  The current development
+version of SixtyPical, unreleased as of this writing, is 0.5-PRE.
 
 Documentation
 -------------
diff --git a/doc/SixtyPical.md b/doc/SixtyPical.md
index 27a3665..8b7f555 100644
--- a/doc/SixtyPical.md
+++ b/doc/SixtyPical.md
@@ -1,7 +1,7 @@
 SixtyPical
 ==========
 
-This document describes the SixtyPical programming language version 0.4-PRE,
+This document describes the SixtyPical programming language version 0.4,
 both its execution aspect and its static analysis aspect (even though
 these are, technically speaking, separate concepts.)