diff --git a/index.d.ts b/index.d.ts
index 1eb21bfc8..919c6edf4 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -68,7 +68,7 @@ declare namespace grapesjs {
     fromElement?: boolean;
 
     /** Show an alert before unload the page with unsaved changes */
-    noticeOnUnload?: number;
+    noticeOnUnload?: number | boolean;
 
     /** Show paddings and margins */
     showOffsets?: boolean;
@@ -425,11 +425,13 @@ declare namespace grapesjs {
     showComputed?: boolean;
     clearProperties?: boolean;
     avoidComputed?: Array<string>;
+    custom?: boolean;
   }
 
   interface BlockManagerConfig {
     appendTo?: HTMLElement | string;
     blocks: Array<object>;
+    custom?: boolean;
   }
 
   interface RichTextEditorConfig {
@@ -1309,7 +1311,8 @@ declare namespace grapesjs {
     | 'block:remove'
     | 'block:drag:start'
     | 'block:drag'
-    | 'block:drag:stop';
+    | 'block:drag:stop'
+    | 'block:custom';
 
   type AssetEvent =
     | 'asset:add'
diff --git a/src/block_manager/index.ts b/src/block_manager/index.ts
index c9abd5daa..b0b3266be 100644
--- a/src/block_manager/index.ts
+++ b/src/block_manager/index.ts
@@ -55,7 +55,7 @@ import { ItemManagerModule } from '../abstract/Module';
 import EditorModel from '../editor/model/Editor';
 import Component from '../dom_components/model/Component';
 
-export type BlockEvent = 'block:add' | 'block:remove' | 'block:drag:start' | 'block:drag' | 'block:drag:stop';
+export type BlockEvent = 'block:add' | 'block:remove' | 'block:drag:start' | 'block:drag' | 'block:drag:stop' | 'block:custom';
 
 export const evAll = 'block';
 export const evPfx = `${evAll}:`;