diff --git a/src/public/types/update-spec.d.ts b/src/public/types/update-spec.d.ts
index 7c6cd1b38..9b1064ffb 100644
--- a/src/public/types/update-spec.d.ts
+++ b/src/public/types/update-spec.d.ts
@@ -1,4 +1,4 @@
 import { KeyPaths, KeyPathValue } from "./keypaths";
 import { PropModification } from "./prop-modification";
 
-export type UpdateSpec<T> = { [KP in KeyPaths<T>]?: KeyPathValue<T, KP> | PropModification };
+export interface UpdateSpec<T> = { [KP in KeyPaths<T>]?: KeyPathValue<T, KP> | PropModification };