diff --git a/prism/CHANGELOG.txt b/prism/CHANGELOG.txt
index 19a70180..ce801a39 100644
--- a/prism/CHANGELOG.txt
+++ b/prism/CHANGELOG.txt
@@ -13,6 +13,12 @@ Ongoing changes:
 * Property names allowed, but mostly not used
 * Testing mode
 
+-----------------------------------------------------------------------------
+Version 4.0 (released 28/6/2011)
+-----------------------------------------------------------------------------
+
+* No changes
+
 -----------------------------------------------------------------------------
 Version 4.0.beta2 (released 10/6/2011)
 -----------------------------------------------------------------------------
diff --git a/prism/src/prism/Prism.java b/prism/src/prism/Prism.java
index 25fecefd..1a0d305d 100644
--- a/prism/src/prism/Prism.java
+++ b/prism/src/prism/Prism.java
@@ -51,9 +51,9 @@ import prism.Model;
 public class Prism implements PrismSettingsListener
 {
 	// prism version
-	private static String version = "4.0.beta";
+	private static String version = "4.0";
 	// prism version suffix
-	private static String versionSuffix = ""; //".rXXXX";;
+	private static String versionSuffix = ".dev"; //".rXXXX";;
 	
 	//------------------------------------------------------------------------------
 	// Constants