diff --git a/ChangeLog b/ChangeLog
index df787169e3..6ee826a78a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,19 @@
+2011-06-08: Version 3.4.3
+
+        Clear the global thread table when an isolate is disposed
+        (issue 1433).
+
+        Converted time zone name to UTF8 on Windows (issue 1290).
+
+        Limited the number of arguments in a function call to 32766
+        (issue 1413).
+
+        Compress sources of JS libraries in addition to the snapshot.
+
+        Fixed a bug in Lithium environment iteration.
+
+        Performance improvements on all platforms.
+
 2011-06-06: Version 3.4.2
 
         More work on ES-Harmony proxies.  Still hidden behind a flag.
diff --git a/src/version.cc b/src/version.cc
index 54cc7c633d..b726a8bba2 100644
--- a/src/version.cc
+++ b/src/version.cc
@@ -34,7 +34,7 @@
 // cannot be changed without changing the SCons build script.
 #define MAJOR_VERSION     3
 #define MINOR_VERSION     4
-#define BUILD_NUMBER      3
+#define BUILD_NUMBER      4
 #define PATCH_LEVEL       0
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)