diff --git a/library.json b/library.json
index b711d63..958dbda 100644
--- a/library.json
+++ b/library.json
@@ -7,7 +7,7 @@
         "type": "git",
         "url": "https://github.com/MLXXXp/Arduboy2.git"
     },
-    "version": "3.1.1",
+    "version": "4.0.0",
     "exclude": "extras",
     "frameworks": "arduino",
     "platforms": "atmelavr"
diff --git a/library.properties b/library.properties
index f224705..f407bfa 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=Arduboy2
-version=3.1.1
+version=4.0.0
 author=Chris J. Martinez, Kevin Bates, Josh Goebel, Scott Allen, Ross O. Shoger
 maintainer=Scott Allen <saydisp-git@yahoo.ca>
 sentence=An alternative library for use with the Arduboy game system.
diff --git a/src/Arduboy2.h b/src/Arduboy2.h
index ed4ae0b..56b88d7 100644
--- a/src/Arduboy2.h
+++ b/src/Arduboy2.h
@@ -32,7 +32,7 @@
  * #endif
  * \endcode
  */
-#define ARDUBOY_LIB_VER 30101
+#define ARDUBOY_LIB_VER 40000
 
 // EEPROM settings
 #define ARDUBOY_UNIT_NAME_LEN 6 /**< The maximum length of the unit name string. */