diff --git a/denops/@denops-private/error.ts b/denops/@denops-private/error.ts
index e8e2cc04..b4b4406d 100644
--- a/denops/@denops-private/error.ts
+++ b/denops/@denops-private/error.ts
@@ -4,7 +4,7 @@ import {
   isErrorObject,
   toErrorObject,
   tryOr,
-} from "jsr:@lambdalisue/errorutil@^1.1.0";
+} from "jsr:@core/errorutil@^1.2.1";
 
 export function errorSerializer(err: unknown): unknown {
   if (err instanceof Error) {
diff --git a/denops/@denops-private/host/nvim_test.ts b/denops/@denops-private/host/nvim_test.ts
index 33f7f426..6ab3cf85 100644
--- a/denops/@denops-private/host/nvim_test.ts
+++ b/denops/@denops-private/host/nvim_test.ts
@@ -12,7 +12,7 @@ import {
 } from "jsr:@std/testing@^1.0.0/mock";
 import { delay } from "jsr:@std/async@^1.0.1/delay";
 import { peekPromiseState } from "jsr:@core/asyncutil@^1.1.1";
-import { unimplemented } from "jsr:@lambdalisue/errorutil@^1.1.0";
+import { unimplemented } from "jsr:@core/errorutil@^1.2.1";
 import { Client } from "jsr:@lambdalisue/messagepack-rpc@^2.4.1";
 import { withNeovim } from "/denops-testutil/with.ts";
 import type { Service } from "../host.ts";
diff --git a/denops/@denops-private/host/vim_test.ts b/denops/@denops-private/host/vim_test.ts
index 1cec704b..88ace8da 100644
--- a/denops/@denops-private/host/vim_test.ts
+++ b/denops/@denops-private/host/vim_test.ts
@@ -11,7 +11,7 @@ import {
 } from "jsr:@std/testing@^1.0.0/mock";
 import { delay } from "jsr:@std/async@^1.0.1/delay";
 import { peekPromiseState } from "jsr:@core/asyncutil@^1.1.1";
-import { unimplemented } from "jsr:@lambdalisue/errorutil@^1.1.0";
+import { unimplemented } from "jsr:@core/errorutil@^1.2.1";
 import { Client, Session } from "jsr:@denops/vim-channel-command@^4.0.2";
 import { withVim } from "/denops-testutil/with.ts";
 import type { Service } from "../host.ts";
diff --git a/denops/@denops-private/host_test.ts b/denops/@denops-private/host_test.ts
index e6df688e..5e218ccb 100644
--- a/denops/@denops-private/host_test.ts
+++ b/denops/@denops-private/host_test.ts
@@ -5,7 +5,7 @@ import {
   stub,
 } from "jsr:@std/testing@^1.0.0/mock";
 import { AssertError } from "jsr:@core/unknownutil@^4.0.0/assert";
-import { unimplemented } from "jsr:@lambdalisue/errorutil@^1.1.0";
+import { unimplemented } from "jsr:@core/errorutil@^1.2.1";
 import { invoke, type Service } from "./host.ts";
 
 Deno.test("invoke", async (t) => {
diff --git a/denops/@denops-private/service.ts b/denops/@denops-private/service.ts
index 38091be9..ba854e72 100644
--- a/denops/@denops-private/service.ts
+++ b/denops/@denops-private/service.ts
@@ -1,6 +1,6 @@
 import type { Denops, Entrypoint, Meta } from "jsr:@denops/core@^7.0.0";
 import { toFileUrl } from "jsr:@std/path@^1.0.2/to-file-url";
-import { toErrorObject } from "jsr:@lambdalisue/errorutil@^1.1.0";
+import { toErrorObject } from "jsr:@core/errorutil@^1.2.1";
 import { DenopsImpl, type Host } from "./denops.ts";
 import type { CallbackId, Service as HostService } from "./host.ts";
 
diff --git a/denops/@denops-private/service_test.ts b/denops/@denops-private/service_test.ts
index 95046967..b7f855e1 100644
--- a/denops/@denops-private/service_test.ts
+++ b/denops/@denops-private/service_test.ts
@@ -21,7 +21,7 @@ import {
 import { toFileUrl } from "jsr:@std/path@^1.0.2/to-file-url";
 import type { Meta } from "jsr:@denops/core@^7.0.0";
 import { flushPromises, peekPromiseState } from "jsr:@core/asyncutil@^1.1.1";
-import { unimplemented } from "jsr:@lambdalisue/errorutil@^1.1.0";
+import { unimplemented } from "jsr:@core/errorutil@^1.2.1";
 import { INVALID_PLUGIN_NAMES } from "/denops-testdata/invalid_plugin_names.ts";
 import { resolveTestDataURL } from "/denops-testdata/resolve.ts";
 import type { Host } from "./denops.ts";
diff --git a/denops/@denops-private/worker.ts b/denops/@denops-private/worker.ts
index 10e2b149..dc2bb121 100644
--- a/denops/@denops-private/worker.ts
+++ b/denops/@denops-private/worker.ts
@@ -6,7 +6,7 @@ import {
   writableStreamFromWorker,
 } from "jsr:@lambdalisue/workerio@^4.0.1";
 import { ensure } from "jsr:@core/unknownutil@^4.0.0/ensure";
-import { pop } from "jsr:@lambdalisue/streamtools@^1.0.0";
+import { pop } from "jsr:@core/streamutil@^1.0.0";
 import { asyncSignal } from "jsr:@milly/async-signal@^1.0.0";
 import type { Meta } from "jsr:@denops/core@^7.0.0";
 import type { Host, HostConstructor } from "./host.ts";
diff --git a/tests/denops/testutil/shared_server.ts b/tests/denops/testutil/shared_server.ts
index 991cefc6..423e5475 100644
--- a/tests/denops/testutil/shared_server.ts
+++ b/tests/denops/testutil/shared_server.ts
@@ -1,7 +1,7 @@
 import { assert } from "jsr:@std/assert@^1.0.1";
 import { deadline } from "jsr:@std/async@^1.0.1/deadline";
 import { resolve } from "jsr:@std/path@^1.0.2/resolve";
-import { channel, pop } from "jsr:@lambdalisue/streamtools@^1.0.0";
+import { channel, pop } from "jsr:@core/streamutil@^1.0.0";
 import { tap } from "jsr:@milly/streams@^1.0.0/transform/tap";
 import { getConfig } from "./conf.ts";
 
diff --git a/tests/denops/testutil/with.ts b/tests/denops/testutil/with.ts
index eac5ed04..3c3f8989 100644
--- a/tests/denops/testutil/with.ts
+++ b/tests/denops/testutil/with.ts
@@ -1,4 +1,4 @@
-import { channel } from "jsr:@lambdalisue/streamtools@^1.0.0";
+import { channel } from "jsr:@core/streamutil@^1.0.0";
 import { tap } from "jsr:@milly/streams@^1.0.0/transform/tap";
 import { ADDR_ENV_NAME } from "./cli.ts";
 import { getConfig } from "./conf.ts";