diff --git a/angular/projects/lib/src/lib/base-widget.ts b/angular/projects/lib/src/lib/base-widget.ts
index 26d8aa3e..a76196ca 100644
--- a/angular/projects/lib/src/lib/base-widget.ts
+++ b/angular/projects/lib/src/lib/base-widget.ts
@@ -1,5 +1,5 @@
 /**
- * gridstack-item.component.ts 12.1.2
+ * gridstack-item.component.ts 12.1.2-dev
  * Copyright (c) 2022-2024 Alain Dumesny - see GridStack root license
  */
 
diff --git a/angular/projects/lib/src/lib/gridstack-item.component.ts b/angular/projects/lib/src/lib/gridstack-item.component.ts
index d5c8770e..0582525b 100644
--- a/angular/projects/lib/src/lib/gridstack-item.component.ts
+++ b/angular/projects/lib/src/lib/gridstack-item.component.ts
@@ -1,5 +1,5 @@
 /**
- * gridstack-item.component.ts 12.1.2
+ * gridstack-item.component.ts 12.1.2-dev
  * Copyright (c) 2022-2024 Alain Dumesny - see GridStack root license
  */
 
diff --git a/angular/projects/lib/src/lib/gridstack.component.ts b/angular/projects/lib/src/lib/gridstack.component.ts
index 59440ff1..3f851659 100644
--- a/angular/projects/lib/src/lib/gridstack.component.ts
+++ b/angular/projects/lib/src/lib/gridstack.component.ts
@@ -1,5 +1,5 @@
 /**
- * gridstack.component.ts 12.1.2
+ * gridstack.component.ts 12.1.2-dev
  * Copyright (c) 2022-2024 Alain Dumesny - see GridStack root license
  */
 
diff --git a/angular/projects/lib/src/lib/gridstack.module.ts b/angular/projects/lib/src/lib/gridstack.module.ts
index 64479fcf..3b1bd76a 100644
--- a/angular/projects/lib/src/lib/gridstack.module.ts
+++ b/angular/projects/lib/src/lib/gridstack.module.ts
@@ -1,5 +1,5 @@
 /**
- * gridstack.component.ts 12.1.2
+ * gridstack.component.ts 12.1.2-dev
  * Copyright (c) 2022-2024 Alain Dumesny - see GridStack root license
  */
 
diff --git a/angular/projects/lib/src/lib/types.ts b/angular/projects/lib/src/lib/types.ts
index 15af50f4..0366ef58 100644
--- a/angular/projects/lib/src/lib/types.ts
+++ b/angular/projects/lib/src/lib/types.ts
@@ -1,5 +1,5 @@
 /**
- * gridstack-item.component.ts 12.1.2
+ * gridstack-item.component.ts 12.1.2-dev
  * Copyright (c) 2025 Alain Dumesny - see GridStack root license
  */
 
diff --git a/doc/CHANGES.md b/doc/CHANGES.md
index 79bde722..4644fac0 100644
--- a/doc/CHANGES.md
+++ b/doc/CHANGES.md
@@ -5,7 +5,7 @@ Change log
 <!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
 **Table of Contents**  *generated with [DocToc](http://doctoc.herokuapp.com/)*
 
-- [12.1.2 (2024-05-07)](#1212-2024-05-07)
+- [12.1.2-dev (2024-05-07)](#1212-2024-05-07)
 - [12.1.1 (2024-04-28)](#1211-2024-04-28)
 - [12.1.0 (2024-04-23)](#1210-2024-04-23)
 - [12.0.0 (2025-04-12)](#1200-2025-04-12)
@@ -127,7 +127,7 @@ Change log
 
 <!-- END doctoc generated TOC please keep comment here to allow auto update -->
 
-## 12.1.2 (2024-05-07)
+## 12.1.2-dev (2024-05-07)
 * fix [#3043](https://github.com/gridstack/gridstack.js/issues/3043) fix `opts.animate` again
 * fix [#3048](https://github.com/gridstack/gridstack.js/pull/3048) nested grid resizeToContentCBCheck() fix
 
diff --git a/package.json b/package.json
index 39a558ff..0a6cba36 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "gridstack",
-  "version": "12.1.2",
+  "version": "12.1.2-dev",
   "license": "MIT",
   "author": "Alain Dumesny <alaind831+github@gmail.com> (https://github.com/adumesny)",
   "contributors": [
diff --git a/react/package.json b/react/package.json
index dd2f1d89..0fd3c256 100644
--- a/react/package.json
+++ b/react/package.json
@@ -27,6 +27,6 @@
     "globals": "^15.9.0",
     "typescript": "^5.5.3",
     "typescript-eslint": "^8.0.1",
-    "vite": "^5.4.18"
+    "vite": "^5.4.19"
   }
 }
diff --git a/react/yarn.lock b/react/yarn.lock
index 27864976..b06d91af 100644
--- a/react/yarn.lock
+++ b/react/yarn.lock
@@ -1222,10 +1222,10 @@ uri-js@^4.2.2:
   dependencies:
     punycode "^2.1.0"
 
-vite@^5.4.18:
-  version "5.4.18"
-  resolved "https://registry.yarnpkg.com/vite/-/vite-5.4.18.tgz#b5af357f9d5ebb2e0c085779b7a37a77f09168a4"
-  integrity sha512-1oDcnEp3lVyHCuQ2YFelM4Alm2o91xNoMncRm1U7S+JdYfYOvbiGZ3/CxGttrOu2M/KcGz7cRC2DoNUA6urmMA==
+vite@^5.4.19:
+  version "5.4.19"
+  resolved "https://registry.yarnpkg.com/vite/-/vite-5.4.19.tgz#20efd060410044b3ed555049418a5e7d1998f959"
+  integrity sha512-qO3aKv3HoQC8QKiNSTuUM1l9o/XX3+c+VTgLHbJWHZGeTPVAg2XwazI9UWzoxjIJCGCV2zU60uqMzjeLZuULqA==
   dependencies:
     esbuild "^0.21.3"
     postcss "^8.4.43"
diff --git a/src/dd-base-impl.ts b/src/dd-base-impl.ts
index 1185d7f3..b320864b 100644
--- a/src/dd-base-impl.ts
+++ b/src/dd-base-impl.ts
@@ -1,5 +1,5 @@
 /**
- * dd-base-impl.ts 12.1.2
+ * dd-base-impl.ts 12.1.2-dev
  * Copyright (c) 2021-2024  Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/dd-draggable.ts b/src/dd-draggable.ts
index 679d7894..d1361b9e 100644
--- a/src/dd-draggable.ts
+++ b/src/dd-draggable.ts
@@ -1,5 +1,5 @@
 /**
- * dd-draggable.ts 12.1.2
+ * dd-draggable.ts 12.1.2-dev
  * Copyright (c) 2021-2024  Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/dd-droppable.ts b/src/dd-droppable.ts
index f000771e..3c196692 100644
--- a/src/dd-droppable.ts
+++ b/src/dd-droppable.ts
@@ -1,5 +1,5 @@
 /**
- * dd-droppable.ts 12.1.2
+ * dd-droppable.ts 12.1.2-dev
  * Copyright (c) 2021-2024  Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/dd-element.ts b/src/dd-element.ts
index b00ee516..3b6a5a02 100644
--- a/src/dd-element.ts
+++ b/src/dd-element.ts
@@ -1,5 +1,5 @@
 /**
- * dd-elements.ts 12.1.2
+ * dd-elements.ts 12.1.2-dev
  * Copyright (c) 2021-2024 Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/dd-gridstack.ts b/src/dd-gridstack.ts
index a10f8f1b..e7f24cad 100644
--- a/src/dd-gridstack.ts
+++ b/src/dd-gridstack.ts
@@ -1,5 +1,5 @@
 /**
- * dd-gridstack.ts 12.1.2
+ * dd-gridstack.ts 12.1.2-dev
  * Copyright (c) 2021-2024 Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/dd-manager.ts b/src/dd-manager.ts
index 469c96e8..55ef30ff 100644
--- a/src/dd-manager.ts
+++ b/src/dd-manager.ts
@@ -1,5 +1,5 @@
 /**
- * dd-manager.ts 12.1.2
+ * dd-manager.ts 12.1.2-dev
  * Copyright (c) 2021-2024 Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/dd-resizable-handle.ts b/src/dd-resizable-handle.ts
index 012f350f..18a5460a 100644
--- a/src/dd-resizable-handle.ts
+++ b/src/dd-resizable-handle.ts
@@ -1,5 +1,5 @@
 /**
- * dd-resizable-handle.ts 12.1.2
+ * dd-resizable-handle.ts 12.1.2-dev
  * Copyright (c) 2021-2024  Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/dd-resizable.ts b/src/dd-resizable.ts
index 21ec6f7b..e2c40e8d 100644
--- a/src/dd-resizable.ts
+++ b/src/dd-resizable.ts
@@ -1,5 +1,5 @@
 /**
- * dd-resizable.ts 12.1.2
+ * dd-resizable.ts 12.1.2-dev
  * Copyright (c) 2021-2024  Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/dd-touch.ts b/src/dd-touch.ts
index 1c826c24..11ac0859 100644
--- a/src/dd-touch.ts
+++ b/src/dd-touch.ts
@@ -1,5 +1,5 @@
 /**
- * touch.ts 12.1.2
+ * touch.ts 12.1.2-dev
  * Copyright (c) 2021-2024 Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/gridstack-engine.ts b/src/gridstack-engine.ts
index be4de847..3d2c1dc4 100644
--- a/src/gridstack-engine.ts
+++ b/src/gridstack-engine.ts
@@ -1,5 +1,5 @@
 /**
- * gridstack-engine.ts 12.1.2
+ * gridstack-engine.ts 12.1.2-dev
  * Copyright (c) 2021-2024  Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/gridstack.scss b/src/gridstack.scss
index 84a54cbc..7ae1d6d0 100644
--- a/src/gridstack.scss
+++ b/src/gridstack.scss
@@ -1,5 +1,5 @@
 /**
- * gridstack SASS styles 12.1.2
+ * gridstack SASS styles 12.1.2-dev
  * Copyright (c) 2021-2024 Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/gridstack.ts b/src/gridstack.ts
index 306692c3..726296ad 100644
--- a/src/gridstack.ts
+++ b/src/gridstack.ts
@@ -1,5 +1,5 @@
 /*!
- * GridStack 12.1.2
+ * GridStack 12.1.2-dev
  * https://gridstackjs.com/
  *
  * Copyright (c) 2021-2024  Alain Dumesny
@@ -1889,7 +1889,7 @@ export class GridStack {
     return this;
   }
 
-  static GDRev = '12.1.2';
+  static GDRev = '12.1.2-dev';
 
   /* ===========================================================================================
    * drag&drop methods that used to be stubbed out and implemented in dd-gridstack.ts
diff --git a/src/types.ts b/src/types.ts
index 6427e65f..644d7b05 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -1,5 +1,5 @@
 /**
- * types.ts 12.1.2
+ * types.ts 12.1.2-dev
  * Copyright (c) 2021-2024 Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/utils.ts b/src/utils.ts
index 352e5f32..5e833eef 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,5 +1,5 @@
 /**
- * utils.ts 12.1.2
+ * utils.ts 12.1.2-dev
  * Copyright (c) 2021-2024 Alain Dumesny - see GridStack root license
  */