diff --git a/HISTORY.md b/HISTORY.md
index a7794b02bf..946b61915f 100755
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -2,6 +2,9 @@
 
 ## in development:
 
+2024-04-17
+* new dev version for v9.2.15
+
 ## 9.2.14:
 * **New Features:**
     * new Σ selector for ssum() of a list: recursive sum of all number leafs
diff --git a/snap.html b/snap.html
index bcda5d2c97..98d2b46e9e 100755
--- a/snap.html
+++ b/snap.html
@@ -20,7 +20,7 @@
         <script src="src/threads.js?version=2024-04-05"></script>
         <script src="src/objects.js?version=2024-01-15"></script>
         <script src="src/scenes.js?version=2022-10-29"></script>
-        <script src="src/gui.js?version=2024-04-05"></script>
+        <script src="src/gui.js?version=2024-04-17"></script>
         <script src="src/paint.js?version=2023-05-24"></script>
         <script src="src/lists.js?version=2024-04-05"></script>
         <script src="src/byob.js?version=2023-07-14"></script>
diff --git a/src/gui.js b/src/gui.js
index b8c01c46a1..5da7195948 100644
--- a/src/gui.js
+++ b/src/gui.js
@@ -87,11 +87,11 @@ BlockVisibilityDialogMorph, ThreadManager, isString, SnapExtensions, snapEquals
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.gui = '2024-April-05';
+modules.gui = '2024-April-17';
 
 // Declarations
 
-var SnapVersion = '9.2.14';
+var SnapVersion = '9.2.15-dev';
 
 var IDE_Morph;
 var ProjectDialogMorph;
diff --git a/sw.js b/sw.js
index ff3ed79344..51274a7005 100644
--- a/sw.js
+++ b/sw.js
@@ -1,4 +1,4 @@
-var snapVersion = '9.2.14',
+var snapVersion = '9.2.15-dev',
     cacheName = `snap-pwa-${snapVersion}`,
     filesToCache = [
         'snap.html',