diff --git a/HISTORY.md b/HISTORY.md
index b347df1a5..055465b7c 100755
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,6 +1,8 @@
 # Snap! (BYOB) History
 
 ## in development:
+
+## 10.3.1:
 * **Notable Fixes:**
     * fixed c-slot rendering for hat blocks
     * loosened type assertions to include hat blocks in some script related extensions
@@ -8,6 +10,7 @@
 ### 2024-12-07
 * blocks, santa: fixed c-slot rendering for hat blocks
 * extensions: loosened type assertions to include hat blocks in some script related extensions
+* prepared v10.3.1 patch
 
 ## 10.3.0:
 * **New Features:**
diff --git a/snap.html b/snap.html
index 70753b458..f1a09ea1a 100755
--- a/snap.html
+++ b/snap.html
@@ -20,7 +20,7 @@
         <script src="src/threads.js?version=2024-12-05"></script>
         <script src="src/objects.js?version=2024-12-04"></script>
         <script src="src/scenes.js?version=2024-05-28"></script>
-        <script src="src/gui.js?version=2024-12-05"></script>
+        <script src="src/gui.js?version=2024-12-07"></script>
         <script src="src/paint.js?version=2023-05-24"></script>
         <script src="src/lists.js?version=2024-11-14"></script>
         <script src="src/byob.js?version=2024-12-04"></script>
diff --git a/src/gui.js b/src/gui.js
index 93ab36f29..cc41e2e6a 100644
--- a/src/gui.js
+++ b/src/gui.js
@@ -87,11 +87,11 @@ HatBlockMorph*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.gui = '2024-December-05';
+modules.gui = '2024-December-07';
 
 // Declarations
 
-var SnapVersion = '10.3.0';
+var SnapVersion = '10.3.1';
 
 var IDE_Morph;
 var ProjectDialogMorph;
diff --git a/sw.js b/sw.js
index b3655b121..5c75cb2d5 100644
--- a/sw.js
+++ b/sw.js
@@ -1,6 +1,6 @@
 /*global self, caches*/
 /*jshint esversion: 6*/
-var snapVersion = '10.3.0',
+var snapVersion = '10.3.1',
     cacheName = `snap-pwa-${snapVersion}`,
     filesToCache = [
         'snap.html',