diff --git a/demo/angular/package.json b/demo/angular/package.json
index 073eedf3b..3e87c981c 100644
--- a/demo/angular/package.json
+++ b/demo/angular/package.json
@@ -18,7 +18,7 @@
     "@angular/platform-browser": "^15.1.1",
     "@angular/platform-browser-dynamic": "^15.1.1",
     "@angular/router": "^15.1.1",
-    "gridstack": "^8.0.1",
+    "gridstack": "^8.1.0",
     "rxjs": "~7.8.1",
     "tslib": "^2.3.0",
     "zone.js": "~0.13.0"
diff --git a/demo/angular/src/app/dummy.component.ts b/demo/angular/src/app/dummy.component.ts
index f547dae15..9624b9b15 100644
--- a/demo/angular/src/app/dummy.component.ts
+++ b/demo/angular/src/app/dummy.component.ts
@@ -1,5 +1,5 @@
 /**
- * gridstack.component.ts 8.1.0
+ * gridstack.component.ts 8.1.0-dev
  * Copyright (c) 2022 Alain Dumesny - see GridStack root license
  */
 
diff --git a/demo/angular/src/app/gridstack-item.component.ts b/demo/angular/src/app/gridstack-item.component.ts
index 33419c93e..29d910a6b 100644
--- a/demo/angular/src/app/gridstack-item.component.ts
+++ b/demo/angular/src/app/gridstack-item.component.ts
@@ -1,5 +1,5 @@
 /**
- * gridstack-item.component.ts 8.1.0
+ * gridstack-item.component.ts 8.1.0-dev
  * Copyright (c) 2022 Alain Dumesny - see GridStack root license
  */
 
diff --git a/demo/angular/src/app/gridstack.component.ts b/demo/angular/src/app/gridstack.component.ts
index bf6bc92f8..bd4e0b376 100644
--- a/demo/angular/src/app/gridstack.component.ts
+++ b/demo/angular/src/app/gridstack.component.ts
@@ -1,5 +1,5 @@
 /**
- * gridstack.component.ts 8.1.0
+ * gridstack.component.ts 8.1.0-dev
  * Copyright (c) 2022 Alain Dumesny - see GridStack root license
  */
 
diff --git a/demo/angular/yarn.lock b/demo/angular/yarn.lock
index 89cd35e7c..c8083a5da 100644
--- a/demo/angular/yarn.lock
+++ b/demo/angular/yarn.lock
@@ -3333,10 +3333,10 @@ graceful-fs@^4.1.2, graceful-fs@^4.1.6, graceful-fs@^4.2.0, graceful-fs@^4.2.4,
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.11.tgz#4183e4e8bf08bb6e05bbb2f7d2e0c8f712ca40e3"
   integrity sha512-RbJ5/jmFcNNCcDV5o9eTnBLJ/HszWV0P73bc+Ff4nS/rJj+YaS6IGyiOL0VoBYX+l1Wrl3k63h/KrH+nhJ0XvQ==
 
-gridstack@^8.0.1:
-  version "8.0.1"
-  resolved "https://registry.yarnpkg.com/gridstack/-/gridstack-8.0.1.tgz#8bd698e922b321ce89bdac93884cc398f7598dd5"
-  integrity sha512-stvrwD/IBQVruz6QQJ3Q14HaU6n0m8QL+Q2EBtERrLoRNd36cYrvRWBP0ll6F7EHnwyS7pSLDUGBOxkTjzVJGw==
+gridstack@^8.1.0:
+  version "8.1.0"
+  resolved "https://registry.yarnpkg.com/gridstack/-/gridstack-8.1.0.tgz#544af2da3602da2c0da249cbb115dcb3e62637cb"
+  integrity sha512-cd/fFRhl4fy5JtLerBCfH1Qrok2x5rTC9Gx5C9FCDIbB/PNVLB4AYom5iRtyPHXR8863gpBzrsEoG5xnr0MTRA==
 
 handle-thing@^2.0.0:
   version "2.0.1"
diff --git a/package.json b/package.json
index c6ed77170..78c89455a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "gridstack",
-  "version": "8.1.0",
+  "version": "8.1.0-dev",
   "license": "MIT",
   "author": "Alain Dumesny <alaind831+github@gmail.com> (https://github.com/adumesny)",
   "contributors": [
diff --git a/src/dd-base-impl.ts b/src/dd-base-impl.ts
index e300d8699..265cd5e47 100644
--- a/src/dd-base-impl.ts
+++ b/src/dd-base-impl.ts
@@ -1,5 +1,5 @@
 /**
- * dd-base-impl.ts 8.1.0
+ * dd-base-impl.ts 8.1.0-dev
  * Copyright (c) 2021-2022 Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/dd-draggable.ts b/src/dd-draggable.ts
index 164c780c1..0391568be 100644
--- a/src/dd-draggable.ts
+++ b/src/dd-draggable.ts
@@ -1,5 +1,5 @@
 /**
- * dd-draggable.ts 8.1.0
+ * dd-draggable.ts 8.1.0-dev
  * Copyright (c) 2021-2022 Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/dd-droppable.ts b/src/dd-droppable.ts
index 81d040068..2e502918b 100644
--- a/src/dd-droppable.ts
+++ b/src/dd-droppable.ts
@@ -1,5 +1,5 @@
 /**
- * dd-droppable.ts 8.1.0
+ * dd-droppable.ts 8.1.0-dev
  * Copyright (c) 2021-2022 Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/dd-element.ts b/src/dd-element.ts
index 70e991405..c73f5acdf 100644
--- a/src/dd-element.ts
+++ b/src/dd-element.ts
@@ -1,5 +1,5 @@
 /**
- * dd-elements.ts 8.1.0
+ * dd-elements.ts 8.1.0-dev
  * Copyright (c) 2021 Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/dd-gridstack.ts b/src/dd-gridstack.ts
index b72fabf02..e0acbb2da 100644
--- a/src/dd-gridstack.ts
+++ b/src/dd-gridstack.ts
@@ -1,5 +1,5 @@
 /**
- * dd-gridstack.ts 8.1.0
+ * dd-gridstack.ts 8.1.0-dev
  * Copyright (c) 2021 Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/dd-manager.ts b/src/dd-manager.ts
index 715548bb5..9aa25a2c7 100644
--- a/src/dd-manager.ts
+++ b/src/dd-manager.ts
@@ -1,5 +1,5 @@
 /**
- * dd-manager.ts 8.1.0
+ * dd-manager.ts 8.1.0-dev
  * Copyright (c) 2021 Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/dd-resizable-handle.ts b/src/dd-resizable-handle.ts
index 03d276b02..b014e4386 100644
--- a/src/dd-resizable-handle.ts
+++ b/src/dd-resizable-handle.ts
@@ -1,5 +1,5 @@
 /**
- * dd-resizable-handle.ts 8.1.0
+ * dd-resizable-handle.ts 8.1.0-dev
  * Copyright (c) 2021-2022 Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/dd-resizable.ts b/src/dd-resizable.ts
index 8162f2e04..828659627 100644
--- a/src/dd-resizable.ts
+++ b/src/dd-resizable.ts
@@ -1,5 +1,5 @@
 /**
- * dd-resizable.ts 8.1.0
+ * dd-resizable.ts 8.1.0-dev
  * Copyright (c) 2021-2022 Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/dd-touch.ts b/src/dd-touch.ts
index d9c682ce3..a5db39f11 100644
--- a/src/dd-touch.ts
+++ b/src/dd-touch.ts
@@ -1,5 +1,5 @@
 /**
- * touch.ts 8.1.0
+ * touch.ts 8.1.0-dev
  * Copyright (c) 2021 Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/gridstack-engine.ts b/src/gridstack-engine.ts
index 194aa4385..015537a99 100644
--- a/src/gridstack-engine.ts
+++ b/src/gridstack-engine.ts
@@ -1,5 +1,5 @@
 /**
- * gridstack-engine.ts 8.1.0
+ * gridstack-engine.ts 8.1.0-dev
  * Copyright (c) 2021-2022 Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/gridstack-poly.js b/src/gridstack-poly.js
index f64841d9b..003c1eee2 100644
--- a/src/gridstack-poly.js
+++ b/src/gridstack-poly.js
@@ -1,5 +1,5 @@
 /**
- * gridstack-poly.ts 8.1.0 used for IE and older browser support (not supported in v2-v4.3.1, but again in v4.4)
+ * gridstack-poly.ts 8.1.0-dev used for IE and older browser support (not supported in v2-v4.3.1, but again in v4.4)
  * Copyright (c) 2021 Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/gridstack.scss b/src/gridstack.scss
index b50fd2532..7207bb6fa 100644
--- a/src/gridstack.scss
+++ b/src/gridstack.scss
@@ -1,5 +1,5 @@
 /**
- * gridstack SASS styles 8.1.0
+ * gridstack SASS styles 8.1.0-dev
  * Copyright (c) 2021 Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/gridstack.ts b/src/gridstack.ts
index dcf224751..f5d53ce1f 100644
--- a/src/gridstack.ts
+++ b/src/gridstack.ts
@@ -1,5 +1,5 @@
 /*!
- * GridStack 8.1.0
+ * GridStack 8.1.0-dev
  * https://gridstackjs.com/
  *
  * Copyright (c) 2021-2022 Alain Dumesny
@@ -1641,7 +1641,7 @@ export class GridStack {
     return this;
   }
 
-  static GDRev = '8.1.0';
+  static GDRev = '8.1.0-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 5fba704ff..220006289 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -1,5 +1,5 @@
 /**
- * types.ts 8.1.0
+ * types.ts 8.1.0-dev
  * Copyright (c) 2021 Alain Dumesny - see GridStack root license
  */
 
diff --git a/src/utils.ts b/src/utils.ts
index e9f4b603a..73c4529e5 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,5 +1,5 @@
 /**
- * utils.ts 8.1.0
+ * utils.ts 8.1.0-dev
  * Copyright (c) 2021 Alain Dumesny - see GridStack root license
  */