diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3fc4952f0..0c3af90f0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,8 +2,9 @@
 
 ## Unreleased
 
-Breaking Changes
+**Breaking Changes**
 - `Stylesheet.getDefaultVertexStyle` and `Stylesheet.getDefaultEdgeStyle` no longer return `undefined`.
+- remove the `CellMap` type. It was not used in the maxGraph code, which should have no impact.
 
 ## 0.2.1
 
diff --git a/packages/core/src/types.ts b/packages/core/src/types.ts
index c61c6239c..7a11742a4 100644
--- a/packages/core/src/types.ts
+++ b/packages/core/src/types.ts
@@ -23,10 +23,6 @@ import type Shape from './view/geometry/Shape';
 import type { Graph } from './view/Graph';
 import type ImageBox from './view/image/ImageBox';
 
-export type CellMap = {
-  [id: string]: Cell;
-};
-
 export type FilterFunction = (cell: Cell) => boolean;
 
 export type UndoableChange = {