diff --git a/HISTORY.md b/HISTORY.md
index af816777..30d73eec 100755
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -4,12 +4,16 @@
* **New Features:**
* **Notable Changes:**
* **Notable Fixes:**
- * no longer translate variable names in drop-down menus for which translation exist
- * fixed zero extent costume creation, thanks, Bernat!
* **Translation Updates:**
+## v5.3.1:
+* **Notable Fixes:**
+ * no longer translate variable names in drop-down menus for which translations exist
+ * fixed zero extent costume creation, thanks, Bernat!
+
### 2019-11-05
* threads: fixed zero extent costume creation, thanks, Bernat!
+* prepared release
### 2019-11-04
* new dev version
diff --git a/snap.html b/snap.html
index 5dd0e893..6620cb9f 100755
--- a/snap.html
+++ b/snap.html
@@ -2,14 +2,14 @@
- Snap! Build Your Own Blocks 5.3.1 - dev -
+ Snap! Build Your Own Blocks 5.3.1
-
+
diff --git a/src/gui.js b/src/gui.js
index 896b4934..63d332db 100644
--- a/src/gui.js
+++ b/src/gui.js
@@ -79,7 +79,7 @@ BlockEditorMorph, BlockDialogMorph*/
// Global stuff ////////////////////////////////////////////////////////
-modules.gui = '2019-November-04';
+modules.gui = '2019-November-05';
// Declarations
@@ -3626,7 +3626,7 @@ IDE_Morph.prototype.aboutSnap = function () {
module, btn1, btn2, btn3, btn4, licenseBtn, translatorsBtn,
world = this.world();
- aboutTxt = 'Snap! 5.3.1 - dev -\nBuild Your Own Blocks\n\n'
+ aboutTxt = 'Snap! 5.3.1\nBuild Your Own Blocks\n\n'
+ 'Copyright \u24B8 2019 Jens M\u00F6nig and '
+ 'Brian Harvey\n'
+ 'jens@moenig.org, bh@cs.berkeley.edu\n\n'