diff --git a/HISTORY.md b/HISTORY.md
index 24681e57..c16f23c7 100755
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -2,8 +2,9 @@
## in development:
+## 6.4.0
* **New Features:**
- * raycasting: new "ray length" option in the "relation TO object" primitive
+ * ray casting: new "ray length" option in the "relation TO object" primitive
* hyperdyadic MIN and MAX primitives reachable via "relabel"
* hyperdyadic less / great than or equals primitives reachable via "relabel"
* hyperdyadic ATAN2 primitive reachable via "relabel"
@@ -27,6 +28,7 @@
### 2020-12-11
* blocks: fixed special drop-downs for keyboard entry
* store: fixed layout issue when importing a sprite in presentation mode
+* prepared minor release
### 2020-12-09
* Tamil translation update, thanks, Barthdry!
diff --git a/snap.html b/snap.html
index f259254d..ed718ba7 100755
--- a/snap.html
+++ b/snap.html
@@ -3,7 +3,7 @@
- Snap! 6.4.0 - dev - Build Your Own Blocks
+ Snap! 6.4.0 Build Your Own Blocks
@@ -11,7 +11,7 @@
-
+
diff --git a/src/gui.js b/src/gui.js
index 3312f5ac..5473e93d 100644
--- a/src/gui.js
+++ b/src/gui.js
@@ -78,7 +78,7 @@ Animation, BoxMorph, BlockEditorMorph, BlockDialogMorph, Note, ZERO, BLACK*/
// Global stuff ////////////////////////////////////////////////////////
-modules.gui = '2020-December-07';
+modules.gui = '2020-December-11';
// Declarations
@@ -4078,7 +4078,7 @@ IDE_Morph.prototype.aboutSnap = function () {
module, btn1, btn2, btn3, btn4, licenseBtn, translatorsBtn,
world = this.world();
- aboutTxt = 'Snap! 6.4.0 - dev -\nBuild Your Own Blocks\n\n'
+ aboutTxt = 'Snap! 6.4.0\nBuild Your Own Blocks\n\n'
+ 'Copyright \u24B8 2008-2020 Jens M\u00F6nig and '
+ 'Brian Harvey\n'
+ 'jens@moenig.org, bh@cs.berkeley.edu\n\n'