diff --git a/.changeset/strange-beers-warn.md b/.changeset/strange-beers-warn.md
new file mode 100644
index 00000000..8db6c4f6
--- /dev/null
+++ b/.changeset/strange-beers-warn.md
@@ -0,0 +1,33 @@
+---
+'@difizen/libro-cofine-textmate': patch
+'@difizen/libro-language-client': patch
+'@difizen/libro-cofine-editor': patch
+'@difizen/libro-markdown-cell': patch
+'@difizen/libro-code-editor': patch
+'@difizen/libro-prompt-cell': patch
+'@difizen/libro-virtualized': patch
+'@difizen/libro-rendermime': patch
+'@difizen/libro-code-cell': patch
+'@difizen/libro-raw-cell': patch
+'@difizen/libro-terminal': patch
+'@difizen/libro-jupyter': patch
+'@difizen/libro-common': patch
+'@difizen/libro-kernel': patch
+'@difizen/libro-output': patch
+'@difizen/libro-search': patch
+'@difizen/libro-widget': patch
+'@difizen/libro-core': patch
+'@difizen/libro-lab': patch
+'@difizen/libro-lsp': patch
+'@difizen/libro-toc': patch
+'@difizen/libro-docs': patch
+'@difizen/libro-codemirror': patch
+'@difizen/libro-cofine-editor-contribution': patch
+'@difizen/libro-cofine-editor-core': patch
+'@difizen/libro-l10n': patch
+'@difizen/libro-markdown': patch
+'@difizen/libro-search-code-cell': patch
+'@difizen/libro-shared-model': patch
+---
+
+fix: add import file extension
diff --git a/packages/libro-cofine-textmate/src/global.d.ts b/packages/libro-cofine-textmate/src/global.d.ts
index d9e254f9..0421ef66 100644
--- a/packages/libro-cofine-textmate/src/global.d.ts
+++ b/packages/libro-cofine-textmate/src/global.d.ts
@@ -1,7 +1,7 @@
-declare module '@difizen/monaco-editor-core/esm/vs/editor/standalone/browser/standaloneServices';
-declare module '@difizen/monaco-editor-core/esm/vs/editor/standalone/common/standaloneTheme';
-declare module '@difizen/monaco-editor-core/esm/vs/editor/common/languages/language';
-declare module '@difizen/monaco-editor-core/esm/vs/editor/common/languages';
-declare module '@difizen/monaco-editor-core/esm/vs/editor/standalone/browser/standaloneLanguages';
+declare module '@difizen/monaco-editor-core/esm/vs/editor/standalone/browser/standaloneServices.js';
+declare module '@difizen/monaco-editor-core/esm/vs/editor/standalone/common/standaloneTheme.js';
+declare module '@difizen/monaco-editor-core/esm/vs/editor/common/languages/language.js';
+declare module '@difizen/monaco-editor-core/esm/vs/editor/common/languages.js';
+declare module '@difizen/monaco-editor-core/esm/vs/editor/standalone/browser/standaloneLanguages.js';
 declare module '*.json';
 declare module 'vscode-oniguruma/release/onig.wasm';
diff --git a/packages/libro-cofine-textmate/src/monaco-textmate-service.ts b/packages/libro-cofine-textmate/src/monaco-textmate-service.ts
index 8fd15d12..f46f5eb5 100644
--- a/packages/libro-cofine-textmate/src/monaco-textmate-service.ts
+++ b/packages/libro-cofine-textmate/src/monaco-textmate-service.ts
@@ -8,11 +8,11 @@ import {
   singleton,
 } from '@difizen/mana-app';
 import * as monaco from '@difizen/monaco-editor-core';
-import { TokenizationRegistry } from '@difizen/monaco-editor-core/esm/vs/editor/common/languages';
-import { ILanguageService } from '@difizen/monaco-editor-core/esm/vs/editor/common/languages/language';
-import { TokenizationSupportAdapter } from '@difizen/monaco-editor-core/esm/vs/editor/standalone/browser/standaloneLanguages';
-import { StandaloneServices } from '@difizen/monaco-editor-core/esm/vs/editor/standalone/browser/standaloneServices';
-import { IStandaloneThemeService } from '@difizen/monaco-editor-core/esm/vs/editor/standalone/common/standaloneTheme';
+import { ILanguageService } from '@difizen/monaco-editor-core/esm/vs/editor/common/languages/language.js';
+import { TokenizationRegistry } from '@difizen/monaco-editor-core/esm/vs/editor/common/languages.js';
+import { TokenizationSupportAdapter } from '@difizen/monaco-editor-core/esm/vs/editor/standalone/browser/standaloneLanguages.js';
+import { StandaloneServices } from '@difizen/monaco-editor-core/esm/vs/editor/standalone/browser/standaloneServices.js';
+import { IStandaloneThemeService } from '@difizen/monaco-editor-core/esm/vs/editor/standalone/common/standaloneTheme.js';
 
 import {
   isBasicWasmSupported,
diff --git a/packages/libro-cofine-textmate/src/monaco-theme-registry.ts b/packages/libro-cofine-textmate/src/monaco-theme-registry.ts
index ded4759c..48680a6c 100644
--- a/packages/libro-cofine-textmate/src/monaco-theme-registry.ts
+++ b/packages/libro-cofine-textmate/src/monaco-theme-registry.ts
@@ -9,8 +9,8 @@ import {
 import type { Color } from '@difizen/mana-app';
 import { Emitter, inject, singleton } from '@difizen/mana-app';
 import * as monaco from '@difizen/monaco-editor-core';
-import { StandaloneServices } from '@difizen/monaco-editor-core/esm/vs/editor/standalone/browser/standaloneServices';
-import { IStandaloneThemeService } from '@difizen/monaco-editor-core/esm/vs/editor/standalone/common/standaloneTheme';
+import { StandaloneServices } from '@difizen/monaco-editor-core/esm/vs/editor/standalone/browser/standaloneServices.js';
+import { IStandaloneThemeService } from '@difizen/monaco-editor-core/esm/vs/editor/standalone/common/standaloneTheme.js';
 
 import { MonacoGrammarRegistry } from './monaco-grammar-registry.js';