diff --git a/types/index.d.ts b/types/index.d.ts
index 7c94aae194faa66ca006ace98cdb0dee82a3e471..0377cace7c4a9653d4ecf963babffd4bd68494b0 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -1,10 +1,10 @@
-import MarkdownIt = require('markdown-it');
-import Token = require('markdown-it/lib/token');
-import State = require('markdown-it/lib/rules_core/state_core');
+import MarkdownIt from 'markdown-it';
+import Token from 'markdown-it/lib/token.mjs';
+import StateCore from 'markdown-it/lib/rules_core/state_core.mjs';
 
 declare namespace anchor {
-  export type RenderHref = (slug: string, state: State) => string;
-  export type RenderAttrs = (slug: string, state: State) => Record<string, string | number>;
+  export type RenderHref = (slug: string, state: StateCore) => string;
+  export type RenderAttrs = (slug: string, state: StateCore) => Record<string, string | number>;
 
   export interface PermalinkOptions {
     class?: string,
@@ -37,7 +37,7 @@ declare namespace anchor {
     placement?: 'before' | 'after'
   }
 
-  export type PermalinkGenerator = (slug: string, opts: PermalinkOptions, state: State, index: number) => void;
+  export type PermalinkGenerator = (slug: string, opts: PermalinkOptions, state: StateCore, index: number) => void;
 
   export interface AnchorInfo {
     slug: string;