diff --git a/ChangeLog b/ChangeLog
index 2817827df6..95c93f81b4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2014-01-21: Version 3.24.20
+
+        ES6: Implement Object.setPrototypeOf (issue 2675).
+
+        Performance and stability improvements on all platforms.
+
+
 2014-01-20: Version 3.24.19
 
         Introduce a setting to control the toolset for which d8 is compiled
diff --git a/src/version.cc b/src/version.cc
index ac6613bda1..d9a64d0e97 100644
--- a/src/version.cc
+++ b/src/version.cc
@@ -34,7 +34,7 @@
 // system so their names cannot be changed without changing the scripts.
 #define MAJOR_VERSION     3
 #define MINOR_VERSION     24
-#define BUILD_NUMBER      20
+#define BUILD_NUMBER      21
 #define PATCH_LEVEL       0
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)