diff --git a/denops/ddu/app.ts b/denops/ddu/app.ts
index 062f18c..14ea3d3 100644
--- a/denops/ddu/app.ts
+++ b/denops/ddu/app.ts
@@ -7,7 +7,6 @@ import type {
   Action,
   ActionHistory,
   BaseActionParams,
-  BaseFilterParams,
   Clipboard,
   Context,
   DduAliasType,
@@ -19,6 +18,7 @@ import type {
   FilterOptions,
   UserOptions,
 } from "./types.ts";
+import type { BaseFilterParams } from "./base/filter.ts";
 import { Ddu } from "./ddu.ts";
 import {
   ContextBuilder,
diff --git a/denops/ddu/context.ts b/denops/ddu/context.ts
index 2a908ab..efadda6 100644
--- a/denops/ddu/context.ts
+++ b/denops/ddu/context.ts
@@ -4,11 +4,6 @@ import * as fn from "jsr:@denops/std@~7.0.3/function";
 import type {
   ActionOptions,
   BaseActionParams,
-  BaseColumnParams,
-  BaseFilterParams,
-  BaseKindParams,
-  BaseSourceParams,
-  BaseUiParams,
   ColumnOptions,
   Context,
   DduOptions,
@@ -18,6 +13,11 @@ import type {
   UiOptions,
   UserOptions,
 } from "./types.ts";
+import type { BaseColumnParams } from "./base/column.ts";
+import type { BaseFilterParams } from "./base/filter.ts";
+import type { BaseKindParams } from "./base/kind.ts";
+import type { BaseSourceParams } from "./base/source.ts";
+import type { BaseUiParams } from "./base/ui.ts";
 import { defaultSourceOptions } from "./base/source.ts";
 import { printError } from "./utils.ts";
 
diff --git a/denops/ddu/ddu.ts b/denops/ddu/ddu.ts
index c225c2c..e0a3caa 100644
--- a/denops/ddu/ddu.ts
+++ b/denops/ddu/ddu.ts
@@ -8,8 +8,6 @@ import { SEPARATOR as pathsep } from "jsr:@std/path@~1.0.2/constants";
 import type {
   ActionHistory,
   BaseActionParams,
-  BaseSource,
-  BaseSourceParams,
   Clipboard,
   Context,
   DduEvent,
@@ -32,6 +30,7 @@ import {
   mergeDduOptions,
 } from "./context.ts";
 import { defaultSourceOptions } from "./base/source.ts";
+import type { BaseSource, BaseSourceParams } from "./base/source.ts";
 import type { Loader } from "./loader.ts";
 import { convertUserString, printError, treePath2Filename } from "./utils.ts";
 import type { AvailableSourceInfo, GatherStateAbortable } from "./state.ts";
diff --git a/denops/ddu/ext.ts b/denops/ddu/ext.ts
index e45ad82..89427f1 100644
--- a/denops/ddu/ext.ts
+++ b/denops/ddu/ext.ts
@@ -7,16 +7,6 @@ import type {
   ActionName,
   ActionOptions,
   BaseActionParams,
-  BaseColumn,
-  BaseColumnParams,
-  BaseFilter,
-  BaseFilterParams,
-  BaseKind,
-  BaseKindParams,
-  BaseSource,
-  BaseSourceParams,
-  BaseUi,
-  BaseUiParams,
   ColumnOptions,
   Context,
   DduItem,
@@ -54,6 +44,11 @@ import { defaultFilterOptions } from "./base/filter.ts";
 import { defaultColumnOptions } from "./base/column.ts";
 import { defaultKindOptions } from "./base/kind.ts";
 import { defaultActionOptions } from "./base/action.ts";
+import type { BaseColumn, BaseColumnParams } from "./base/column.ts";
+import type { BaseFilter, BaseFilterParams } from "./base/filter.ts";
+import type { BaseKind, BaseKindParams } from "./base/kind.ts";
+import type { BaseSource, BaseSourceParams } from "./base/source.ts";
+import type { BaseUi, BaseUiParams } from "./base/ui.ts";
 import type { Loader } from "./loader.ts";
 import { convertUserString, printError } from "./utils.ts";
 
diff --git a/denops/ddu/loader.ts b/denops/ddu/loader.ts
index 6920ce5..6a18e35 100644
--- a/denops/ddu/loader.ts
+++ b/denops/ddu/loader.ts
@@ -1,14 +1,4 @@
 import type {
-  BaseColumn,
-  BaseColumnParams,
-  BaseFilter,
-  BaseFilterParams,
-  BaseKind,
-  BaseKindParams,
-  BaseSource,
-  BaseSourceParams,
-  BaseUi,
-  BaseUiParams,
   ColumnName,
   DduAliasType,
   DduExtType,
@@ -17,6 +7,11 @@ import type {
   SourceName,
   UiName,
 } from "./types.ts";
+import type { BaseColumn, BaseColumnParams } from "./base/column.ts";
+import type { BaseFilter, BaseFilterParams } from "./base/filter.ts";
+import type { BaseKind, BaseKindParams } from "./base/kind.ts";
+import type { BaseSource, BaseSourceParams } from "./base/source.ts";
+import type { BaseUi, BaseUiParams } from "./base/ui.ts";
 import type { Denops } from "jsr:@denops/std@~7.0.3";
 import { Lock } from "jsr:@core/asyncutil@~1.1.1/lock";
 import { basename } from "jsr:@std/path@~1.0.2/basename";
diff --git a/denops/ddu/state.ts b/denops/ddu/state.ts
index 89a0220..a6d6002 100644
--- a/denops/ddu/state.ts
+++ b/denops/ddu/state.ts
@@ -1,11 +1,7 @@
 import { is } from "jsr:@core/unknownutil@~4.3.0/is";
 import { maybe } from "jsr:@core/unknownutil@~4.3.0/maybe";
-import type {
-  BaseSource,
-  BaseSourceParams,
-  DduItem,
-  SourceOptions,
-} from "./types.ts";
+import type { DduItem, SourceOptions } from "./types.ts";
+import type { BaseSource, BaseSourceParams } from "./base/source.ts";
 
 export type AvailableSourceInfo<
   Params extends BaseSourceParams = BaseSourceParams,
diff --git a/denops/ddu/types.ts b/denops/ddu/types.ts
index 3d3d12d..72e850b 100644
--- a/denops/ddu/types.ts
+++ b/denops/ddu/types.ts
@@ -5,18 +5,6 @@ import type { BaseKindParams } from "./base/kind.ts";
 import type { BaseColumnParams } from "./base/column.ts";
 import type { Denops } from "jsr:@denops/std@~7.0.3";
 
-export { BaseConfig } from "./base/config.ts";
-export { BaseUi } from "./base/ui.ts";
-export type { BaseUiParams, UiActionArguments, UiActions } from "./base/ui.ts";
-export { BaseSource } from "./base/source.ts";
-export type { BaseSourceParams } from "./base/source.ts";
-export { BaseFilter } from "./base/filter.ts";
-export type { BaseFilterParams } from "./base/filter.ts";
-export { BaseKind } from "./base/kind.ts";
-export type { BaseKindParams } from "./base/kind.ts";
-export { BaseColumn } from "./base/column.ts";
-export type { BaseColumnParams } from "./base/column.ts";
-
 export { ContextBuilder } from "./context.ts";
 
 export type { Ddu } from "./ddu.ts";