diff --git a/packages/ckeditor5/src/plugins/file_upload/fileuploadcommand.ts b/packages/ckeditor5/src/plugins/file_upload/fileuploadcommand.ts
index d5a2c7237..a6a30f4bf 100644
--- a/packages/ckeditor5/src/plugins/file_upload/fileuploadcommand.ts
+++ b/packages/ckeditor5/src/plugins/file_upload/fileuploadcommand.ts
@@ -1,4 +1,4 @@
-import { Command, FileRepository, Model, type NodeAttributes, type Writer } from "ckeditor5";
+import { Command, FileRepository, Model, type NodeAttributes, type ModelWriter } from "ckeditor5";
 
 interface FileUploadOpts {
     file: File[];
@@ -34,7 +34,7 @@ export default class FileUploadCommand extends Command {
 /**
  * 	Handles uploading single file.
  */
-function uploadFile( writer: Writer, model: Model, fileRepository: FileRepository, file: File ) {
+function uploadFile( writer: ModelWriter, model: Model, fileRepository: FileRepository, file: File ) {
 	const loader = fileRepository.createLoader( file );
 
 	// Do not throw when upload adapter is not set. FileRepository will log an error anyway.
@@ -45,7 +45,7 @@ function uploadFile( writer: Writer, model: Model, fileRepository: FileRepositor
 	insertFileLink( writer, model, { href: '', uploadId: loader.id }, file );
 }
 
-function insertFileLink( writer: Writer, model: Model, attributes: NodeAttributes = {}, file: File ) {
+function insertFileLink( writer: ModelWriter, model: Model, attributes: NodeAttributes = {}, file: File ) {
 	const placeholder = writer.createElement( 'reference', attributes );
 	model.insertContent( placeholder, model.document.selection );
 	writer.insertText( ' ', placeholder, 'after' );
diff --git a/packages/ckeditor5/src/plugins/syntax_highlighting/index.ts b/packages/ckeditor5/src/plugins/syntax_highlighting/index.ts
index e1df31b1c..f9d656964 100644
--- a/packages/ckeditor5/src/plugins/syntax_highlighting/index.ts
+++ b/packages/ckeditor5/src/plugins/syntax_highlighting/index.ts
@@ -1,4 +1,4 @@
-import type { ModelElement, ModelPosition, Writer } from "ckeditor5";
+import type { ModelElement, ModelPosition, ModelWriter } from "ckeditor5";
 import type { ModelNode, Editor } from "ckeditor5";
 import { Plugin } from "ckeditor5";
 
@@ -149,7 +149,7 @@ export default class SyntaxHighlighting extends Plugin {
      *     the formatting would be stored with the note and it would need a
      *     way to remove that formatting when editing back the note.
      */
-    highlightCodeBlock(codeBlock: ModelElement, writer: Writer) {
+    highlightCodeBlock(codeBlock: ModelElement, writer: ModelWriter) {
         log("highlighting codeblock " + JSON.stringify(codeBlock.toJSON()));
         const model = codeBlock.root.document?.model;
         if (!model) {