diff --git a/packages/core/src/block_manager/index.ts b/packages/core/src/block_manager/index.ts
index 9f942acba..a777dc7cd 100644
--- a/packages/core/src/block_manager/index.ts
+++ b/packages/core/src/block_manager/index.ts
@@ -36,7 +36,7 @@ import Block, { BlockProperties } from './model/Block';
 import Blocks from './model/Blocks';
 import Categories from '../abstract/ModuleCategories';
 import Category, { getItemsByCategory } from '../abstract/ModuleCategory';
-import { BlocksByCategory, BlocksEvents } from './types';
+import { BlocksByCategory, BlocksCustomData, BlocksEvents } from './types';
 import BlocksView from './view/BlocksView';
 
 export type BlockEvent = `${BlocksEvents}`;
@@ -90,7 +90,7 @@ export default class BlockManager extends ItemManagerModule<BlockManagerConfig,
     this.em.trigger(this.events.custom, this.__customData());
   }
 
-  __customData() {
+  __customData(): BlocksCustomData {
     const bhv = this.__getBehaviour();
     return {
       bm: this as BlockManager,
diff --git a/packages/core/src/block_manager/types.ts b/packages/core/src/block_manager/types.ts
index 9cce17c82..d08793f9b 100644
--- a/packages/core/src/block_manager/types.ts
+++ b/packages/core/src/block_manager/types.ts
@@ -1,9 +1,22 @@
-import { ItemsByCategory } from '../abstract/ModuleCategory';
-import { AddOptions, RemoveOptions } from '../common';
+import BlockManager from '.';
+import Category, { CategoryProperties, ItemsByCategory } from '../abstract/ModuleCategory';
+import { AddOptions, Model, ObjectAny, RemoveOptions } from '../common';
+import Component from '../dom_components/model/Component';
 import Block from './model/Block';
 
 export interface BlocksByCategory extends ItemsByCategory<Block> {}
 
+export interface BlocksCustomData {
+  bm: BlockManager;
+  blocks: Block[];
+  container: HTMLElement | undefined;
+  dragStart: (block: Block, ev?: Event) => void;
+  drag: (ev: Event) => void;
+  dragStop: (cancel?: boolean) => void;
+}
+
+export type BlockEvent = `${BlocksEvents}`;
+
 /**{START_EVENTS}*/
 export enum BlocksEvents {
   /**
@@ -81,7 +94,14 @@ export enum BlocksEvents {
 export interface BlocksEventCallback {
   [BlocksEvents.add]: [Block, AddOptions];
   [BlocksEvents.remove]: [Block, RemoveOptions];
+  [BlocksEvents.removeBefore]: [Block, () => void, RemoveOptions];
   [BlocksEvents.update]: [Block, AddOptions];
+  [BlocksEvents.dragStart]: [Block, DragEvent?];
+  [BlocksEvents.drag]: [Block, DragEvent?];
+  [BlocksEvents.dragEnd]: [Component | undefined, Block];
+  [BlocksEvents.categoryUpdate]: [{ category: Category; changes: Partial<CategoryProperties>; options: AddOptions }];
+  [BlocksEvents.custom]: [BlocksCustomData];
+  [BlocksEvents.all]: [{ event: BlockEvent; model?: Model; options: ObjectAny }];
 }
 
 // need this to avoid the TS documentation generator to break