diff --git a/CHANGELOG.md b/CHANGELOG.md
index 03baeb51..246fd9f0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,8 +1,8 @@
 ArduinoJson: change log
 =======================
 
-HEAD
-----
+v6.7.0-beta (2018-12-07)
+-----------
 
 * Removed the automatic expansion of `DynamicJsonDocument`, it now has a fixed capacity.
 * Restored the monotonic allocator because the code was getting too big
diff --git a/library.json b/library.json
index f0072af4..89b5f3b8 100644
--- a/library.json
+++ b/library.json
@@ -7,7 +7,7 @@
     "type": "git",
     "url": "https://github.com/bblanchon/ArduinoJson.git"
   },
-  "version": "6.6.0-beta",
+  "version": "6.7.0-beta",
   "authors": {
     "name": "Benoit Blanchon",
     "url": "https://blog.benoitblanchon.fr"
diff --git a/library.properties b/library.properties
index 54bf038f..a1674b2c 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=ArduinoJson
-version=6.6.0-beta
+version=6.7.0-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 1c63a64c..0d1e7a74 100644
--- a/src/ArduinoJson/version.hpp
+++ b/src/ArduinoJson/version.hpp
@@ -4,7 +4,7 @@
 
 #pragma once
 
-#define ARDUINOJSON_VERSION "6.6.0-beta"
+#define ARDUINOJSON_VERSION "6.7.0-beta"
 #define ARDUINOJSON_VERSION_MAJOR 6
-#define ARDUINOJSON_VERSION_MINOR 6
+#define ARDUINOJSON_VERSION_MINOR 7
 #define ARDUINOJSON_VERSION_REVISION 0