diff --git a/CHANGELOG.md b/CHANGELOG.md
index 52238413..bd72d66d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,10 +1,11 @@
 ArduinoJson: change log
 =======================
 
-HEAD
-----
+v6.4.0-beta (2018-09-11)
+-----------
 
 * Copy `JsonArray` and `JsonObject`, instead of storing pointers (issue #780)
+* Added `JsonVariant::to<JsonArray>()` and `JsonVariant::to<JsonObject>()`
 
 v6.3.0-beta (2018-08-31)
 -----------
diff --git a/library.json b/library.json
index 5c7850a6..80035775 100644
--- a/library.json
+++ b/library.json
@@ -7,7 +7,7 @@
     "type": "git",
     "url": "https://github.com/bblanchon/ArduinoJson.git"
   },
-  "version": "6.3.0-beta",
+  "version": "6.4.0-beta",
   "authors": {
     "name": "Benoit Blanchon",
     "url": "https://blog.benoitblanchon.fr"
diff --git a/library.properties b/library.properties
index 6fd8d242..cf565fba 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=ArduinoJson
-version=6.3.0-beta
+version=6.4.0-beta
 author=Benoit Blanchon <blog.benoitblanchon.fr>
 maintainer=Benoit Blanchon <blog.benoitblanchon.fr>
 sentence=An efficient and elegant JSON library for Arduino.
diff --git a/src/ArduinoJson/version.hpp b/src/ArduinoJson/version.hpp
index c169632a..548b0726 100644
--- a/src/ArduinoJson/version.hpp
+++ b/src/ArduinoJson/version.hpp
@@ -4,7 +4,7 @@
 
 #pragma once
 
-#define ARDUINOJSON_VERSION "6.3.0-beta"
+#define ARDUINOJSON_VERSION "6.4.0-beta"
 #define ARDUINOJSON_VERSION_MAJOR 6
-#define ARDUINOJSON_VERSION_MINOR 3
+#define ARDUINOJSON_VERSION_MINOR 4
 #define ARDUINOJSON_VERSION_REVISION 0