diff --git a/HISTORY.md b/HISTORY.md
index 43c43b17..12d44c7e 100755
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -6,6 +6,9 @@
* **Notable Fixes:**
* **Translation Updates:**
+### 2019-08-07
+* new dev version
+
## v5.0.9
* **New Feature:**
* new experimental "paste on" block in the "pen" category, currently hidden in dev mode
diff --git a/snap.html b/snap.html
index 69ad8a7d..07d49e33 100755
--- a/snap.html
+++ b/snap.html
@@ -2,14 +2,14 @@
- Snap! Build Your Own Blocks 5.0.9
+ Snap! Build Your Own Blocks 5.0.10 - dev -
-
+
diff --git a/src/gui.js b/src/gui.js
index c4cd068c..9e3674fd 100644
--- a/src/gui.js
+++ b/src/gui.js
@@ -75,7 +75,7 @@ isRetinaSupported, SliderMorph, Animation, BoxMorph, MediaRecorder*/
// Global stuff ////////////////////////////////////////////////////////
-modules.gui = '2019-August-06';
+modules.gui = '2019-August-07';
// Declarations
@@ -3596,7 +3596,7 @@ IDE_Morph.prototype.aboutSnap = function () {
module, btn1, btn2, btn3, btn4, licenseBtn, translatorsBtn,
world = this.world();
- aboutTxt = 'Snap! 5.0.9\nBuild Your Own Blocks\n\n'
+ aboutTxt = 'Snap! 5.0.10 - dev -\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'