diff --git a/README.md b/README.md
index d9ca348..3fe9ec5 100644
--- a/README.md
+++ b/README.md
@@ -291,6 +291,14 @@ PNG.adjustGamma(png);
 Changelog
 ============
 
+### 3.3.1 - 15/11/2017
+
+- Bugfixes and removal of es6
+
+### 3.3.0
+
+- Add writing 16 bit channels and support for grayscale input
+
 ### 3.2.0 - 30/04/2017
 
 - Support for encoding 8-bit grayscale images
diff --git a/package.json b/package.json
index 4743239..46a60a1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pngjs",
-  "version": "3.3.0",
+  "version": "3.3.1",
   "description": "PNG encoder/decoder in pure JS, supporting any bit size & interlace, async & sync with full test suite.",
   "contributors": [
     "Alexandre Paré",