diff --git a/denops/skkeleton/config.ts b/denops/skkeleton/config.ts
index e3ff4cdd..6d59059a 100644
--- a/denops/skkeleton/config.ts
+++ b/denops/skkeleton/config.ts
@@ -1,9 +1,11 @@
 import { Denops } from "./deps.ts";
-import { is, u } from "./deps/unknownutil.ts";
 import { getKanaTable, loadKanaTableFiles } from "./kana.ts";
 import { ConfigOptions, Encode, Encoding } from "./types.ts";
 import { homeExpand } from "./util.ts";
 
+import { is } from "jsr:@core/unknownutil@~4.3.0/is";
+import { ensure } from "jsr:@core/unknownutil@~4.3.0/ensure";
+
 export const config: Omit<ConfigOptions, "globalDictionaries"> & {
   globalDictionaries: [string, string][];
 } = {
@@ -47,11 +49,11 @@ function ensureEncoding(x: unknown): Encoding {
 }
 
 const validators: Validators = {
-  acceptIllegalResult: (x) => u.ensure(x, is.Boolean),
-  completionRankFile: (x) => u.ensure(x, is.String),
-  databasePath: (x) => u.ensure(x, is.String),
-  debug: (x) => u.ensure(x, is.Boolean),
-  eggLikeNewline: (x) => u.ensure(x, is.Boolean),
+  acceptIllegalResult: (x) => ensure(x, is.Boolean),
+  completionRankFile: (x) => ensure(x, is.String),
+  databasePath: (x) => ensure(x, is.String),
+  debug: (x) => ensure(x, is.Boolean),
+  eggLikeNewline: (x) => ensure(x, is.Boolean),
   globalDictionaries: (x): (string | [string, string])[] => {
     if (
       !is.ArrayOf(
@@ -78,11 +80,11 @@ const validators: Validators = {
     }
     return x;
   },
-  immediatelyCancel: (x) => u.ensure(x, is.Boolean),
-  immediatelyDictionaryRW: (x) => u.ensure(x, is.Boolean),
-  immediatelyOkuriConvert: (x) => u.ensure(x, is.Boolean),
+  immediatelyCancel: (x) => ensure(x, is.Boolean),
+  immediatelyDictionaryRW: (x) => ensure(x, is.Boolean),
+  immediatelyOkuriConvert: (x) => ensure(x, is.Boolean),
   kanaTable: (x): string => {
-    const name = u.ensure(x, is.String);
+    const name = ensure(x, is.String);
     try {
       getKanaTable(name);
     } catch {
@@ -90,33 +92,33 @@ const validators: Validators = {
     }
     return name;
   },
-  keepMode: (x) => u.ensure(x, is.Boolean),
-  keepState: (x) => u.ensure(x, is.Boolean),
-  markerHenkan: (x) => u.ensure(x, is.String),
-  markerHenkanSelect: (x) => u.ensure(x, is.String),
-  registerConvertResult: (x) => u.ensure(x, is.Boolean),
+  keepMode: (x) => ensure(x, is.Boolean),
+  keepState: (x) => ensure(x, is.Boolean),
+  markerHenkan: (x) => ensure(x, is.String),
+  markerHenkanSelect: (x) => ensure(x, is.String),
+  registerConvertResult: (x) => ensure(x, is.Boolean),
   selectCandidateKeys: (x) => {
-    const keys = u.ensure(x, is.String);
+    const keys = ensure(x, is.String);
     if (keys.length !== 7) {
       throw TypeError("selectCandidateKeys.length !== 7");
     }
     return keys;
   },
-  setUndoPoint: (x) => u.ensure(x, is.Boolean),
-  showCandidatesCount: (x) => u.ensure(x, is.Number),
-  skkServerHost: (x) => u.ensure(x, is.String),
-  skkServerPort: (x) => u.ensure(x, is.Number),
+  setUndoPoint: (x) => ensure(x, is.Boolean),
+  showCandidatesCount: (x) => ensure(x, is.Number),
+  skkServerHost: (x) => ensure(x, is.String),
+  skkServerPort: (x) => ensure(x, is.Number),
   skkServerReqEnc: ensureEncoding,
   skkServerResEnc: ensureEncoding,
-  sources: (x) => u.ensure(x, is.ArrayOf(is.String)),
+  sources: (x) => ensure(x, is.ArrayOf(is.String)),
   useGoogleJapaneseInput: () => {
     throw '`useGoogleJapaneseInput` is removed. Please use `sources` with "google_japanese_input"';
   },
-  usePopup: (x) => u.ensure(x, is.Boolean),
+  usePopup: (x) => ensure(x, is.Boolean),
   useSkkServer: () => {
     throw '`useSkkServer` is removed. Please use `sources` with "skk_server"';
   },
-  userDictionary: (x) => u.ensure(x, is.String),
+  userDictionary: (x) => ensure(x, is.String),
 };
 
 async function normalize(
diff --git a/denops/skkeleton/config_test.ts b/denops/skkeleton/config_test.ts
index 156a15e0..6bdc63df 100644
--- a/denops/skkeleton/config_test.ts
+++ b/denops/skkeleton/config_test.ts
@@ -1,13 +1,14 @@
 import { config } from "./config.ts";
 import { Context } from "./context.ts";
 import { Denops } from "./deps.ts";
-import { assertEquals } from "./deps/std/assert.ts";
 import { disable } from "./function/disable.ts";
 import { katakana } from "./function/mode.ts";
 import { dispatch } from "./function/testutil.ts";
 import { currentContext, currentLibrary, variables } from "./store.ts";
 import { test } from "./testutil.ts";
 
+import { assertEquals } from "jsr:@std/assert@~1.0.3/equals";
+
 const defaultConfig = { ...config };
 
 const lib = await currentLibrary.get();
diff --git a/denops/skkeleton/deps/dictionary.ts b/denops/skkeleton/deps/dictionary.ts
index d8ed0da2..66007c90 100644
--- a/denops/skkeleton/deps/dictionary.ts
+++ b/denops/skkeleton/deps/dictionary.ts
@@ -1,4 +1,4 @@
-export * as yaml from "jsr:@std/yaml@1.0.4";
-export * as msgpack from "https://esm.sh/@msgpack/msgpack@3.0.0-beta2";
-export { default as jsonschema } from "https://esm.sh/jsonschema@1.4.1";
+export * as yaml from "jsr:@std/yaml@~1.0.5";
+export * as msgpack from "npm:@msgpack/msgpack@3.0.0-beta2";
+export { default as jsonschema } from "npm:jsonschema@1.4.1";
 export { default as jisyoschema } from "https://cdn.jsdelivr.net/gh/skk-dict/jisyo/schema/jisyo.schema.v0.0.0.json" with { type: "json" };
diff --git a/denops/skkeleton/deps/encoding_japanese.ts b/denops/skkeleton/deps/encoding_japanese.ts
deleted file mode 100644
index 34719122..00000000
--- a/denops/skkeleton/deps/encoding_japanese.ts
+++ /dev/null
@@ -1 +0,0 @@
-export * as encoding from "https://esm.sh/encoding-japanese@2.2.0/";
diff --git a/denops/skkeleton/deps/japanese_numeral.ts b/denops/skkeleton/deps/japanese_numeral.ts
deleted file mode 100644
index ce8ba401..00000000
--- a/denops/skkeleton/deps/japanese_numeral.ts
+++ /dev/null
@@ -1 +0,0 @@
-export * as JpNum from "https://esm.sh/@geolonia/japanese-numeral@1.0.2";
diff --git a/denops/skkeleton/deps/roman.ts b/denops/skkeleton/deps/roman.ts
deleted file mode 100644
index ddb673bd..00000000
--- a/denops/skkeleton/deps/roman.ts
+++ /dev/null
@@ -1 +0,0 @@
-export * as RomanNum from "https://esm.sh/cr-numeral@1.1.3";
diff --git a/denops/skkeleton/deps/std/assert.ts b/denops/skkeleton/deps/std/assert.ts
deleted file mode 100644
index 60f46a73..00000000
--- a/denops/skkeleton/deps/std/assert.ts
+++ /dev/null
@@ -1 +0,0 @@
-export * from "jsr:@std/assert@~1.0.3";
diff --git a/denops/skkeleton/deps/std/async.ts b/denops/skkeleton/deps/std/async.ts
deleted file mode 100644
index 903d9a33..00000000
--- a/denops/skkeleton/deps/std/async.ts
+++ /dev/null
@@ -1 +0,0 @@
-export * from "jsr:@std/async@~1.0.4";
diff --git a/denops/skkeleton/deps/std/collections.ts b/denops/skkeleton/deps/std/collections.ts
deleted file mode 100644
index 43c2dab1..00000000
--- a/denops/skkeleton/deps/std/collections.ts
+++ /dev/null
@@ -1 +0,0 @@
-export * from "jsr:@std/collections@~1.0.5";
diff --git a/denops/skkeleton/deps/std/path.ts b/denops/skkeleton/deps/std/path.ts
deleted file mode 100644
index 83bee8ec..00000000
--- a/denops/skkeleton/deps/std/path.ts
+++ /dev/null
@@ -1 +0,0 @@
-export * from "jsr:@std/path@~1.0.3";
diff --git a/denops/skkeleton/deps/std/streams.ts b/denops/skkeleton/deps/std/streams.ts
deleted file mode 100644
index 9fb58b9a..00000000
--- a/denops/skkeleton/deps/std/streams.ts
+++ /dev/null
@@ -1 +0,0 @@
-export { TextLineStream } from "jsr:@std/streams@~1.0.3/text-line-stream";
diff --git a/denops/skkeleton/deps/unknownutil.ts b/denops/skkeleton/deps/unknownutil.ts
deleted file mode 100644
index 0c64f172..00000000
--- a/denops/skkeleton/deps/unknownutil.ts
+++ /dev/null
@@ -1,2 +0,0 @@
-export * as u from "jsr:@core/unknownutil@~4.3.0";
-export { is } from "jsr:@core/unknownutil@~4.3.0/is";
diff --git a/denops/skkeleton/dictionary.ts b/denops/skkeleton/dictionary.ts
index 7472ba2f..ed9e77f2 100644
--- a/denops/skkeleton/dictionary.ts
+++ b/denops/skkeleton/dictionary.ts
@@ -1,9 +1,10 @@
 import { config } from "./config.ts";
-import { toFileUrl } from "./deps/std/path.ts";
-import { JpNum } from "./deps/japanese_numeral.ts";
-import { RomanNum } from "./deps/roman.ts";
-import { zip } from "./deps/std/collections.ts";
 import type { CompletionData, RankData } from "./types.ts";
+import { number2kanji } from "npm:@geolonia/japanese-numeral@1.0.2";
+import { convertNumberToRoman } from "npm:cr-numeral@1.1.3";
+
+import { toFileUrl } from "jsr:@std/path@~1.0.3/to-file-url";
+import { zip } from "jsr:@std/collections@~1.0.5/zip";
 
 export const okuriAriMarker = ";; okuri-ari entries.";
 export const okuriNasiMarker = ";; okuri-nasi entries.";
@@ -54,8 +55,8 @@ function toKanjiModern(n: number): string {
     return kanjiNumbers[parseInt(c)];
   });
 }
-const toRoman: (n: number) => string = RomanNum.convertNumberToRoman;
-const toKanjiClassic: (n: number) => string = JpNum.number2kanji;
+const toRoman: (n: number) => string = convertNumberToRoman;
+const toKanjiClassic: (n: number) => string = number2kanji;
 
 function toDaiji(n: number): string {
   return toKanjiClassic(n)
diff --git a/denops/skkeleton/dictionary_test.ts b/denops/skkeleton/dictionary_test.ts
index 0d89f6b7..82735e0a 100644
--- a/denops/skkeleton/dictionary_test.ts
+++ b/denops/skkeleton/dictionary_test.ts
@@ -1,10 +1,13 @@
-import { dirname, fromFileUrl, join } from "./deps/std/path.ts";
-import { assertEquals } from "./deps/std/assert.ts";
 import { Dictionary, Library, wrapDictionary } from "./dictionary.ts";
 import { Dictionary as SkkDictionary } from "./sources/skk_dictionary.ts";
 import { Dictionary as DenoKvDictionary } from "./sources/deno_kv.ts";
 import { Dictionary as UserDictionary } from "./sources/user_dictionary.ts";
 
+import { assertEquals } from "jsr:@std/assert@~1.0.3/equals";
+import { dirname } from "jsr:@std/path@~1.0.3/dirname";
+import { fromFileUrl } from "jsr:@std/path@~1.0.3/from-file-url";
+import { join } from "jsr:@std/path@~1.0.3/join";
+
 const newJisyoJson = join(
   dirname(fromFileUrl(import.meta.url)),
   "testdata",
diff --git a/denops/skkeleton/function/common_test.ts b/denops/skkeleton/function/common_test.ts
index 3dacd6ec..d582f06b 100644
--- a/denops/skkeleton/function/common_test.ts
+++ b/denops/skkeleton/function/common_test.ts
@@ -1,11 +1,12 @@
 import { config } from "../config.ts";
 import { Context } from "../context.ts";
-import { assertEquals } from "../deps/std/assert.ts";
 import { currentLibrary } from "../store.ts";
 import { cancel, kakutei, kakuteiKey } from "./common.ts";
 import { katakana } from "./mode.ts";
 import { dispatch } from "./testutil.ts";
 
+import { assertEquals } from "jsr:@std/assert@~1.0.3/equals";
+
 const lib = await currentLibrary.get();
 
 await lib.registerHenkanResult("okurinasi", "あ", "い");
diff --git a/denops/skkeleton/function/dictionary_test.ts b/denops/skkeleton/function/dictionary_test.ts
index 785a2067..f4f7efb5 100644
--- a/denops/skkeleton/function/dictionary_test.ts
+++ b/denops/skkeleton/function/dictionary_test.ts
@@ -1,11 +1,12 @@
 import { Denops } from "../deps.ts";
-import { assertEquals } from "../deps/std/assert.ts";
 import { currentKanaTable, getKanaTable } from "../kana.ts";
 import { HenkanState } from "../state.ts";
 import { currentContext } from "../store.ts";
 import { test } from "../testutil.ts";
 import { registerWord } from "./dictionary.ts";
 
+import { assertEquals } from "jsr:@std/assert@~1.0.3/equals";
+
 test({
   mode: "all",
   name: "Don't put string when register dictionary was cancelled",
diff --git a/denops/skkeleton/function/disable_test.ts b/denops/skkeleton/function/disable_test.ts
index 0239fa1b..1168f24f 100644
--- a/denops/skkeleton/function/disable_test.ts
+++ b/denops/skkeleton/function/disable_test.ts
@@ -1,9 +1,10 @@
 import { Denops } from "../deps.ts";
-import { assertEquals } from "../deps/std/assert.ts";
 import { currentContext } from "../store.ts";
 import { test } from "../testutil.ts";
 import { dispatch } from "./testutil.ts";
 
+import { assertEquals } from "jsr:@std/assert@~1.0.3/equals";
+
 // deno-lint-ignore no-explicit-any
 async function getResult(x: Promise<any>): Promise<string> {
   return (await x)?.result;
diff --git a/denops/skkeleton/function/henkan_test.ts b/denops/skkeleton/function/henkan_test.ts
index 4fbaaeac..2e27e05c 100644
--- a/denops/skkeleton/function/henkan_test.ts
+++ b/denops/skkeleton/function/henkan_test.ts
@@ -1,8 +1,9 @@
 import { Context } from "../context.ts";
-import { assertEquals } from "../deps/std/assert.ts";
 import { currentLibrary } from "../store.ts";
 import { dispatch } from "./testutil.ts";
 
+import { assertEquals } from "jsr:@std/assert@~1.0.3/equals";
+
 const l = await currentLibrary.get();
 await l.registerHenkanResult("okurinasi", "へんかん", "返還");
 await l.registerHenkanResult("okurinasi", "へんかん", "変換");
diff --git a/denops/skkeleton/function/input_test.ts b/denops/skkeleton/function/input_test.ts
index 3e6c377e..5e79b8f4 100644
--- a/denops/skkeleton/function/input_test.ts
+++ b/denops/skkeleton/function/input_test.ts
@@ -1,13 +1,14 @@
 import { config } from "../config.ts";
 import { Context } from "../context.ts";
 import { Denops, op } from "../deps.ts";
-import { assertEquals } from "../deps/std/assert.ts";
 import { test } from "../testutil.ts";
 import { kakutei } from "./common.ts";
 import { deleteChar, henkanPoint } from "./input.ts";
 import { hankatakana, katakana } from "./mode.ts";
 import { dispatch } from "./testutil.ts";
 
+import { assertEquals } from "jsr:@std/assert@~1.0.3/equals";
+
 Deno.test({
   name: "kana input",
   async fn() {
diff --git a/denops/skkeleton/function/mode_test.ts b/denops/skkeleton/function/mode_test.ts
index 23a8920d..385a42ea 100644
--- a/denops/skkeleton/function/mode_test.ts
+++ b/denops/skkeleton/function/mode_test.ts
@@ -1,5 +1,4 @@
 import { autocmd, Denops, vars } from "../deps.ts";
-import { assertEquals } from "../deps/std/assert.ts";
 import { currentKanaTable } from "../kana.ts";
 import { currentLibrary } from "../store.ts";
 import { currentContext } from "../store.ts";
@@ -9,6 +8,8 @@ import { deleteChar, kanaInput } from "./input.ts";
 import { abbrev, hankatakana, katakana, zenkaku } from "./mode.ts";
 import { dispatch } from "./testutil.ts";
 
+import { assertEquals } from "jsr:@std/assert@~1.0.3/equals";
+
 test({
   mode: "all",
   name: "Can get skkeleton mode",
diff --git a/denops/skkeleton/kana.ts b/denops/skkeleton/kana.ts
index a88c8fab..12185e5a 100644
--- a/denops/skkeleton/kana.ts
+++ b/denops/skkeleton/kana.ts
@@ -1,12 +1,14 @@
 import { config } from "./config.ts";
-import { distinctBy } from "./deps/std/collections.ts";
-import { is, u } from "./deps/unknownutil.ts";
 import { functions } from "./function.ts";
 import { romToHira } from "./kana/rom_hira.ts";
 import { romToZen } from "./kana/rom_zen.ts";
 import type { KanaResult, KanaTable } from "./kana/type.ts";
 import { Cell, readFileWithEncoding } from "./util.ts";
 
+import { distinctBy } from "jsr:@std/collections@~1.0.5/distinct-by";
+import { is } from "jsr:@core/unknownutil@~4.3.0/is";
+import { assert } from "jsr:@core/unknownutil@~4.3.0/assert";
+
 type PartialKanaTable = [string, KanaResult | null][];
 
 const tables: Cell<Record<string, KanaTable>> = new Cell(() => ({
@@ -52,7 +54,7 @@ export function registerKanaTable(
     console.log("skkeleton: new kana table");
     console.log(`name: ${name}, table: ${Deno.inspect(rawTable)}`);
   }
-  u.assert(rawTable, is.Record);
+  assert(rawTable, is.Record);
   const table: PartialKanaTable = Object.entries(rawTable)
     .map(([kana, result]) => {
       return [kana, asKanaResult(result)];
diff --git a/denops/skkeleton/kana_test.ts b/denops/skkeleton/kana_test.ts
index de0e2fc9..c13fd030 100644
--- a/denops/skkeleton/kana_test.ts
+++ b/denops/skkeleton/kana_test.ts
@@ -1,11 +1,13 @@
+import { Denops } from "./deps.ts";
 import { config } from "./config.ts";
 import { Context } from "./context.ts";
-import { assertEquals } from "./deps/std/assert.ts";
 import { dispatch } from "./function/testutil.ts";
 import { registerKanaTable } from "./kana.ts";
 import { currentContext } from "./store.ts";
 import { test } from "./testutil.ts";
 
+import { assertEquals } from "jsr:@std/assert@~1.0.3/equals";
+
 Deno.test({
   name: "customize kanatable",
   async fn() {
@@ -34,7 +36,7 @@ Deno.test({
 test({
   mode: "all",
   name: "create kanatable",
-  async fn(denops) {
+  async fn(denops: Denops) {
     registerKanaTable("test", {
       a: ["hoge", ""],
     }, true);
diff --git a/denops/skkeleton/keymap_test.ts b/denops/skkeleton/keymap_test.ts
index 928f1a84..c3b2c922 100644
--- a/denops/skkeleton/keymap_test.ts
+++ b/denops/skkeleton/keymap_test.ts
@@ -1,12 +1,14 @@
+import { Denops } from "./deps.ts";
 import { test } from "./testutil.ts";
-import { assertEquals } from "./deps/std/assert.ts";
 import { currentLibrary } from "./store.ts";
 import { currentContext } from "./store.ts";
 
+import { assertEquals } from "jsr:@std/assert@~1.0.3/equals";
+
 test({
   mode: "nvim", // can input mode test only in nvim
   name: "registerKeyMap",
-  async fn(denops) {
+  async fn(denops: Denops) {
     const lib = await currentLibrary.get();
     lib.registerHenkanResult("okurinasi", "あ", "亜");
     await denops.cmd('call skkeleton#register_keymap("henkan", "x", "")');
diff --git a/denops/skkeleton/main.ts b/denops/skkeleton/main.ts
index 9d5ba237..cb586b05 100644
--- a/denops/skkeleton/main.ts
+++ b/denops/skkeleton/main.ts
@@ -1,6 +1,5 @@
 import { config, setConfig } from "./config.ts";
 import { autocmd, Denops, Entrypoint, fn, vars } from "./deps.ts";
-import { is, u } from "./deps/unknownutil.ts";
 import { functions, modeFunctions } from "./function.ts";
 import { disable as disableFunc } from "./function/disable.ts";
 import { load as loadDictionary } from "./dictionary.ts";
@@ -13,6 +12,9 @@ import { currentContext, currentLibrary, variables } from "./store.ts";
 import { globpath } from "./util.ts";
 import type { CompletionData, RankData } from "./types.ts";
 
+import { is } from "jsr:@core/unknownutil@~4.3.0/is";
+import { assert, AssertError } from "jsr:@core/unknownutil@~4.3.0/assert";
+
 type Opts = {
   key: string | string[];
   function?: string;
@@ -45,7 +47,7 @@ function isOpts(x: any): x is Opts {
 
 function assertOpts(x: unknown): asserts x is Opts {
   if (!isOpts(x)) {
-    throw new u.AssertError("value must be Opts");
+    throw new AssertError("value must be Opts");
   }
 }
 
@@ -257,18 +259,18 @@ export const main: Entrypoint = async (denops) => {
   }
   denops.dispatcher = {
     async config(config: unknown) {
-      u.assert(config, is.Record);
+      assert(config, is.Record);
       await setConfig(config, denops);
       return;
     },
     async registerKeyMap(state: unknown, key: unknown, funcName: unknown) {
-      u.assert(state, is.String);
-      u.assert(key, is.String);
+      assert(state, is.String);
+      assert(key, is.String);
       await receiveNotation(denops);
       registerKeyMap(state, key, funcName);
     },
     registerKanaTable(tableName: unknown, table: unknown, create: unknown) {
-      u.assert(tableName, is.String);
+      assert(tableName, is.String);
       registerKanaTable(tableName, table, !!create);
       return Promise.resolve();
     },
@@ -334,8 +336,8 @@ export const main: Entrypoint = async (denops) => {
       await denops.dispatcher.completeCallback(kana, word);
     },
     async completeCallback(kana: unknown, word: unknown) {
-      u.assert(kana, is.String);
-      u.assert(word, is.String);
+      assert(kana, is.String);
+      assert(word, is.String);
       const lib = await currentLibrary.get();
       await lib.registerHenkanResult("okurinasi", kana, word);
       const context = currentContext.get();
@@ -359,9 +361,9 @@ export const main: Entrypoint = async (denops) => {
       await currentLibrary.get();
     },
     async updateDatabase(path: unknown, encoding: unknown, force: unknown) {
-      u.assert(path, is.String);
-      u.assert(encoding, is.String);
-      u.assert(force, is.Boolean);
+      assert(path, is.String);
+      assert(encoding, is.String);
+      assert(force, is.Boolean);
       await DenoKvDictionary.create(path, encoding)
         .then((dict) => dict.load(force));
       await denops.cmd(`echomsg 'updated database: "${path}"'`);
diff --git a/denops/skkeleton/notation.ts b/denops/skkeleton/notation.ts
index 3d9d28b5..2c7d3e63 100644
--- a/denops/skkeleton/notation.ts
+++ b/denops/skkeleton/notation.ts
@@ -1,5 +1,7 @@
 import type { Denops } from "./deps.ts";
-import { is, u } from "./deps/unknownutil.ts";
+
+import { is } from "jsr:@core/unknownutil@~4.3.0/is";
+import { assert } from "jsr:@core/unknownutil@~4.3.0/assert";
 
 let received = false;
 export let notationToKey: Record<string, string> = {};
@@ -10,10 +12,10 @@ export async function receiveNotation(denops: Denops) {
     return;
   }
   const n2k = await denops.eval("g:skkeleton#notation#notation_to_key");
-  u.assert(n2k, is.RecordOf(is.String));
+  assert(n2k, is.RecordOf(is.String));
   notationToKey = n2k;
   const k2n = await denops.eval("g:skkeleton#notation#key_to_notation");
-  u.assert(k2n, is.RecordOf(is.String));
+  assert(k2n, is.RecordOf(is.String));
   keyToNotation = k2n;
   received = true;
 }
diff --git a/denops/skkeleton/preedit_test.ts b/denops/skkeleton/preedit_test.ts
index d72f7054..b23b9662 100644
--- a/denops/skkeleton/preedit_test.ts
+++ b/denops/skkeleton/preedit_test.ts
@@ -1,6 +1,7 @@
-import { assertEquals } from "./deps/std/assert.ts";
 import { PreEdit } from "./preedit.ts";
 
+import { assertEquals } from "jsr:@std/assert@~1.0.3/equals";
+
 Deno.test({
   name: "preedit test",
   fn() {
diff --git a/denops/skkeleton/sources/google_japanese_input.ts b/denops/skkeleton/sources/google_japanese_input.ts
index 63358f8e..1027cd8c 100644
--- a/denops/skkeleton/sources/google_japanese_input.ts
+++ b/denops/skkeleton/sources/google_japanese_input.ts
@@ -5,7 +5,8 @@ import {
   Source as BaseSource,
 } from "../dictionary.ts";
 import type { CompletionData } from "../types.ts";
-import { deadline } from "../deps/std/async.ts";
+
+import { deadline } from "jsr:@std/async@~1.0.4/deadline";
 
 export class Source implements BaseSource {
   getDictionaries(): Promise<BaseDictionary[]> {
diff --git a/denops/skkeleton/sources/skk_server.ts b/denops/skkeleton/sources/skk_server.ts
index 8288153a..f5cff6fe 100644
--- a/denops/skkeleton/sources/skk_server.ts
+++ b/denops/skkeleton/sources/skk_server.ts
@@ -1,14 +1,15 @@
 import { config } from "../config.ts";
-import { encoding } from "../deps/encoding_japanese.ts";
-import { Encode } from "../types.ts";
-import { getKanaTable } from "../kana.ts";
-import { TextLineStream } from "../deps/std/streams.ts";
 import {
   Dictionary as BaseDictionary,
   HenkanType,
   Source as BaseSource,
 } from "../dictionary.ts";
+import { getKanaTable } from "../kana.ts";
+import { Encode } from "../types.ts";
 import type { CompletionData, Encoding, SkkServerOptions } from "../types.ts";
+import * as encoding from "npm:encoding-japanese@2.2.0";
+
+import { TextLineStream } from "jsr:@std/streams@~1.0.3/text-line-stream";
 
 type Server = {
   conn: Deno.Conn;
diff --git a/denops/skkeleton/sources/user_dictionary.ts b/denops/skkeleton/sources/user_dictionary.ts
index 9d841f8e..5943af2a 100644
--- a/denops/skkeleton/sources/user_dictionary.ts
+++ b/denops/skkeleton/sources/user_dictionary.ts
@@ -11,7 +11,9 @@ import {
   UserDictionaryPath,
 } from "../dictionary.ts";
 import { wrap } from "../deps/iterator_helpers.ts";
-import { is, u } from "../deps/unknownutil.ts";
+
+import { is } from "jsr:@core/unknownutil@~4.3.0/is";
+import { assert } from "jsr:@core/unknownutil@~4.3.0/assert";
 
 export class Source implements BaseSource {
   async getDictionaries(): Promise<BaseDictionary[]> {
@@ -166,7 +168,7 @@ export class Dictionary implements UserDictionary {
       return;
     }
     const rankData = JSON.parse(await Deno.readTextFile(rankPath));
-    u.assert(rankData, is.ArrayOf(is.String));
+    assert(rankData, is.ArrayOf(is.String));
     this.#rank = new Map(rankData.map((c, i) => [c, i]));
   }
 
diff --git a/denops/skkeleton/testutil.ts b/denops/skkeleton/testutil.ts
index dbb85906..5f88925d 100644
--- a/denops/skkeleton/testutil.ts
+++ b/denops/skkeleton/testutil.ts
@@ -1,11 +1,13 @@
 import { autocmd, Denops } from "./deps.ts";
 import * as DenopsTest from "./deps/denops_test.ts";
-import * as path from "./deps/std/path.ts";
 import { main } from "./main.ts";
 import { currentContext } from "./store.ts";
 
-const runtimepath = path.resolve(
-  path.fromFileUrl(new URL("../..", import.meta.url)),
+import { fromFileUrl } from "jsr:@std/path@~1.0.3/from-file-url";
+import { resolve } from "jsr:@std/path@~1.0.3/resolve";
+
+const runtimepath = resolve(
+  fromFileUrl(new URL("../..", import.meta.url)),
 );
 
 // It is inspired from https://github.com/lambdalisue/gin.vim/blob/e737a4b59a9d391c49aaa07f7c4d91e4a29ae09c/denops/gin/util/testutil.ts
diff --git a/denops/skkeleton/util.ts b/denops/skkeleton/util.ts
index 463d9cda..2a304646 100644
--- a/denops/skkeleton/util.ts
+++ b/denops/skkeleton/util.ts
@@ -1,6 +1,8 @@
 import { Denops, fn, op } from "./deps.ts";
-import { basename, parse } from "./deps/std/path.ts";
-import { encoding } from "./deps/encoding_japanese.ts";
+import * as encoding from "npm:encoding-japanese@2.2.0";
+
+import { basename } from "jsr:@std/path@~1.0.3/basename";
+import { parse } from "jsr:@std/path@~1.0.3/parse";
 
 export class Cell<T> {
   initialized = false;
diff --git a/denops/skkeleton/util_test.ts b/denops/skkeleton/util_test.ts
index da764ea3..2a9d9ea5 100644
--- a/denops/skkeleton/util_test.ts
+++ b/denops/skkeleton/util_test.ts
@@ -1,6 +1,7 @@
-import { assertEquals } from "./deps/std/assert.ts";
 import { LazyCell } from "./util.ts";
 
+import { assertEquals } from "jsr:@std/assert@~1.0.3/equals";
+
 Deno.test({
   name: "LazyCell",
   async fn(t) {