diff --git a/src/ast.ts b/src/ast.ts
index 167d733..01d8626 100644
--- a/src/ast.ts
+++ b/src/ast.ts
@@ -4,9 +4,9 @@ import {
   Emitter,
   Range,
   RequestType,
-  StaticFeature,
-  TextDocumentIdentifier,
-  TreeDataProvider,
+  type StaticFeature,
+  type TextDocumentIdentifier,
+  type TreeDataProvider,
   TreeItem,
   TreeItemCollapsibleState,
   Uri,
@@ -14,7 +14,7 @@ import {
   window,
   workspace,
 } from 'coc.nvim';
-import { Ctx } from './ctx';
+import type { Ctx } from './ctx';
 
 // The wire format: we send a position, and get back a tree of ASTNode.
 interface ASTParams {
diff --git a/src/cmds.ts b/src/cmds.ts
index 02d407f..f81c4a3 100644
--- a/src/cmds.ts
+++ b/src/cmds.ts
@@ -1,7 +1,7 @@
-import * as fs from 'fs';
-import * as path from 'path';
-import { RequestType, TextDocumentIdentifier, TextDocumentPositionParams, Uri, window, workspace } from 'coc.nvim';
-import { Ctx } from './ctx';
+import * as fs from 'node:fs';
+import * as path from 'node:path';
+import { RequestType, type TextDocumentIdentifier, type TextDocumentPositionParams, Uri, window, workspace } from 'coc.nvim';
+import type { Ctx } from './ctx';
 
 namespace SwitchSourceHeaderRequest {
   export const type = new RequestType<TextDocumentIdentifier, string, void>('textDocument/switchSourceHeader');
diff --git a/src/config.ts b/src/config.ts
index 109a5b8..9e33ce4 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -1,4 +1,4 @@
-import { WorkspaceConfiguration, workspace } from 'coc.nvim';
+import { type WorkspaceConfiguration, workspace } from 'coc.nvim';
 export class Config {
   private cfg: WorkspaceConfiguration;
 
diff --git a/src/ctx.ts b/src/ctx.ts
index 11b0286..05e928d 100644
--- a/src/ctx.ts
+++ b/src/ctx.ts
@@ -1,18 +1,18 @@
-import { existsSync } from 'fs';
-import { join } from 'path';
+import { existsSync } from 'node:fs';
+import { join } from 'node:path';
 import {
   CompletionItemKind,
-  Disposable,
-  DocumentSelector,
-  Executable,
-  ExtensionContext,
+  type Disposable,
+  type DocumentSelector,
+  type Executable,
+  type ExtensionContext,
   InsertTextFormat,
   LanguageClient,
-  LanguageClientOptions,
-  LinesTextDocument,
-  ServerOptions,
-  StaticFeature,
-  TextEdit,
+  type LanguageClientOptions,
+  type LinesTextDocument,
+  type ServerOptions,
+  type StaticFeature,
+  type TextEdit,
   services,
   workspace,
 } from 'coc.nvim';
diff --git a/src/file-status.ts b/src/file-status.ts
index 02280fc..4f61c2a 100644
--- a/src/file-status.ts
+++ b/src/file-status.ts
@@ -1,5 +1,5 @@
-import { Disposable, StatusBarItem, window, workspace } from 'coc.nvim';
-import { Config } from './config';
+import { type Disposable, type StatusBarItem, window, workspace } from 'coc.nvim';
+import type { Config } from './config';
 
 export interface Status {
   uri: string;
diff --git a/src/index.ts b/src/index.ts
index b911e90..54a2983 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,8 +1,8 @@
-import { ExtensionContext, State, commands, services, window, workspace } from 'coc.nvim';
+import { type ExtensionContext, State, commands, services, window, workspace } from 'coc.nvim';
 import { ASTFeature } from './ast';
 import * as cmds from './cmds';
 import { ClangdExtensionFeature, Ctx } from './ctx';
-import { FileStatus, Status } from './file-status';
+import { FileStatus, type Status } from './file-status';
 import { InlayHintsFeature } from './inlay-hints';
 import * as install from './install';
 import { MemoryUsageFeature } from './memory-usage';
diff --git a/src/inlay-hints.ts b/src/inlay-hints.ts
index 33068c7..d9e7287 100644
--- a/src/inlay-hints.ts
+++ b/src/inlay-hints.ts
@@ -1,19 +1,19 @@
 import {
-  CancellationToken,
-  FeatureState,
-  InlayHint,
+  type CancellationToken,
+  type FeatureState,
+  type InlayHint,
   InlayHintKind,
-  InlayHintsProvider,
-  LinesTextDocument,
-  Position,
-  Range,
+  type InlayHintsProvider,
+  type LinesTextDocument,
+  type Position,
+  type Range,
   RequestType,
-  StaticFeature,
-  TextDocumentIdentifier,
+  type StaticFeature,
+  type TextDocumentIdentifier,
   languages,
 } from 'coc.nvim';
 
-import { Ctx, documentSelector } from './ctx';
+import { type Ctx, documentSelector } from './ctx';
 
 namespace protocol {
   export interface InlayHint {
diff --git a/src/install.ts b/src/install.ts
index 64286a9..2c01ca7 100644
--- a/src/install.ts
+++ b/src/install.ts
@@ -1,4 +1,4 @@
-import { homedir } from 'os';
+import { homedir } from 'node:os';
 import * as common from '@clangd/install';
 import * as coc from 'coc.nvim';
 import { find } from 'fs-jetpack';
diff --git a/src/memory-usage.ts b/src/memory-usage.ts
index 541635c..6ae20f6 100644
--- a/src/memory-usage.ts
+++ b/src/memory-usage.ts
@@ -1,7 +1,7 @@
 // Implements the "memory usage" feature.
 
-import { RequestType0, StaticFeature, commands, window } from 'coc.nvim';
-import { Ctx } from './ctx';
+import { RequestType0, type StaticFeature, commands, window } from 'coc.nvim';
+import type { Ctx } from './ctx';
 
 // LSP wire format for this clangd feature.
 interface WireTree {