diff --git a/Cargo.lock b/Cargo.lock
index ee536102a..dc20aab6a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1163,11 +1163,9 @@ dependencies = [
  "futures-core",
  "futures-util",
  "indicatif",
- "itertools",
  "octocrab",
  "once_cell",
  "parse-display",
- "platforms",
  "rayon",
  "reqwest",
  "rstest",
@@ -2670,12 +2668,6 @@ version = "0.3.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1df8c4ec4b0627e53bdf214615ad287367e482558cf84b109250b37464dc03ae"
 
-[[package]]
-name = "platforms"
-version = "3.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e3d7ddaed09e0eb771a79ab0fd64609ba0afb0a8366421957936ad14cbd13630"
-
 [[package]]
 name = "polling"
 version = "2.3.0"
@@ -4281,7 +4273,6 @@ dependencies = [
  "derive_more",
  "duplicate",
  "easy-ext",
- "flate2",
  "fs-err",
  "futures",
  "heck",
@@ -4297,8 +4288,6 @@ dependencies = [
  "rstest",
  "serde",
  "serde_json",
- "strum",
- "tar",
  "tempfile",
  "test_util",
  "thiserror",
@@ -4362,7 +4351,6 @@ dependencies = [
  "serde_json",
  "test_util",
  "tokio",
- "tracing",
  "tracing-subscriber",
  "uuid",
  "voicevox_core",
@@ -4382,7 +4370,6 @@ dependencies = [
  "serde_json",
  "test_util",
  "tokio",
- "tracing",
  "uuid",
  "voicevox_core",
 ]
diff --git a/_typos.toml b/_typos.toml
index 836b1d79a..b70ddc608 100644
--- a/_typos.toml
+++ b/_typos.toml
@@ -2,7 +2,6 @@
 # Instruction:  https://github.com/marketplace/actions/typos-action#getting-started
 
 [default.extend-identifiers]
-NDArray="NDArray" # numpy
 NdArray="NdArray" # onnxruntime::session::NdArray
 
 [default.extend-words]
diff --git a/crates/downloader/Cargo.toml b/crates/downloader/Cargo.toml
index 5b48dd1f3..7c45a74ca 100644
--- a/crates/downloader/Cargo.toml
+++ b/crates/downloader/Cargo.toml
@@ -18,11 +18,9 @@ fs-err.workspace = true
 futures-core = "0.3.25"
 futures-util = "0.3.25"
 indicatif = "0.17.3"
-itertools.workspace = true
 octocrab = { version = "0.19.0", default-features = false, features = ["rustls-tls", "stream"] }
 once_cell.workspace = true
 parse-display = "0.8.2"
-platforms = "3.0.2"
 rayon = "1.6.1"
 reqwest = { version = "0.11.13", default-features = false, features = ["rustls-tls", "stream"] }
 strum.workspace = true
diff --git a/crates/voicevox_core/Cargo.toml b/crates/voicevox_core/Cargo.toml
index c2159782c..3a23b794a 100644
--- a/crates/voicevox_core/Cargo.toml
+++ b/crates/voicevox_core/Cargo.toml
@@ -26,7 +26,6 @@ once_cell.workspace = true
 regex.workspace = true
 serde.workspace = true
 serde_json.workspace = true
-strum.workspace = true
 tempfile.workspace = true
 thiserror.workspace = true
 tokio.workspace = true
@@ -42,11 +41,9 @@ git = "https://github.com/VOICEVOX/open_jtalk-rs.git"
 rev = "a16714ce16dec76fd0e3041a7acfa484921db3b5"
 
 [dev-dependencies]
-flate2 = "1.0.24"
 heck = "0.4.0"
 pretty_assertions = "1.3.0"
 rstest.workspace = true
-tar = "0.4.38"
 test_util.workspace = true
 
 [target."cfg(windows)".dependencies]
diff --git a/crates/voicevox_core_java_api/Cargo.toml b/crates/voicevox_core_java_api/Cargo.toml
index ecf6d8f79..325d28bd2 100644
--- a/crates/voicevox_core_java_api/Cargo.toml
+++ b/crates/voicevox_core_java_api/Cargo.toml
@@ -18,10 +18,9 @@ jni = "0.21.1"
 once_cell.workspace = true
 serde_json.workspace = true
 tokio.workspace = true
-tracing.workspace = true
 tracing-subscriber.workspace = true
 uuid.workspace = true
 voicevox_core.workspace = true
 
 [dev-dependencies]
-test_util.workspace = true
+test_util.workspace = true # only for it's build script
diff --git a/crates/voicevox_core_python_api/Cargo.toml b/crates/voicevox_core_python_api/Cargo.toml
index a5b09bd6e..195b90c28 100644
--- a/crates/voicevox_core_python_api/Cargo.toml
+++ b/crates/voicevox_core_python_api/Cargo.toml
@@ -23,8 +23,7 @@ pyo3-asyncio = { version = "0.18.0", features = ["tokio-runtime"] }
 pyo3-log = "0.8.0"
 serde.workspace = true
 serde_json.workspace = true
-test_util.workspace = true
+test_util.workspace = true # only for it's build script
 tokio.workspace = true
-tracing.workspace = true
 uuid.workspace = true
 voicevox_core.workspace = true
diff --git a/crates/voicevox_core_python_api/poetry.lock b/crates/voicevox_core_python_api/poetry.lock
index 82cffe35c..64d3c4561 100644
--- a/crates/voicevox_core_python_api/poetry.lock
+++ b/crates/voicevox_core_python_api/poetry.lock
@@ -488,43 +488,6 @@ files = [
     {file = "mypy_extensions-1.0.0.tar.gz", hash = "sha256:75dbf8955dc00442a438fc4d0666508a9a97b6bd41aa2f0ffe9d2f2725af0782"},
 ]
 
-[[package]]
-name = "numpy"
-version = "1.24.4"
-description = "Fundamental package for array computing in Python"
-optional = false
-python-versions = ">=3.8"
-files = [
-    {file = "numpy-1.24.4-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:c0bfb52d2169d58c1cdb8cc1f16989101639b34c7d3ce60ed70b19c63eba0b64"},
-    {file = "numpy-1.24.4-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:ed094d4f0c177b1b8e7aa9cba7d6ceed51c0e569a5318ac0ca9a090680a6a1b1"},
-    {file = "numpy-1.24.4-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:79fc682a374c4a8ed08b331bef9c5f582585d1048fa6d80bc6c35bc384eee9b4"},
-    {file = "numpy-1.24.4-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:7ffe43c74893dbf38c2b0a1f5428760a1a9c98285553c89e12d70a96a7f3a4d6"},
-    {file = "numpy-1.24.4-cp310-cp310-win32.whl", hash = "sha256:4c21decb6ea94057331e111a5bed9a79d335658c27ce2adb580fb4d54f2ad9bc"},
-    {file = "numpy-1.24.4-cp310-cp310-win_amd64.whl", hash = "sha256:b4bea75e47d9586d31e892a7401f76e909712a0fd510f58f5337bea9572c571e"},
-    {file = "numpy-1.24.4-cp311-cp311-macosx_10_9_x86_64.whl", hash = "sha256:f136bab9c2cfd8da131132c2cf6cc27331dd6fae65f95f69dcd4ae3c3639c810"},
-    {file = "numpy-1.24.4-cp311-cp311-macosx_11_0_arm64.whl", hash = "sha256:e2926dac25b313635e4d6cf4dc4e51c8c0ebfed60b801c799ffc4c32bf3d1254"},
-    {file = "numpy-1.24.4-cp311-cp311-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:222e40d0e2548690405b0b3c7b21d1169117391c2e82c378467ef9ab4c8f0da7"},
-    {file = "numpy-1.24.4-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:7215847ce88a85ce39baf9e89070cb860c98fdddacbaa6c0da3ffb31b3350bd5"},
-    {file = "numpy-1.24.4-cp311-cp311-win32.whl", hash = "sha256:4979217d7de511a8d57f4b4b5b2b965f707768440c17cb70fbf254c4b225238d"},
-    {file = "numpy-1.24.4-cp311-cp311-win_amd64.whl", hash = "sha256:b7b1fc9864d7d39e28f41d089bfd6353cb5f27ecd9905348c24187a768c79694"},
-    {file = "numpy-1.24.4-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:1452241c290f3e2a312c137a9999cdbf63f78864d63c79039bda65ee86943f61"},
-    {file = "numpy-1.24.4-cp38-cp38-macosx_11_0_arm64.whl", hash = "sha256:04640dab83f7c6c85abf9cd729c5b65f1ebd0ccf9de90b270cd61935eef0197f"},
-    {file = "numpy-1.24.4-cp38-cp38-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:a5425b114831d1e77e4b5d812b69d11d962e104095a5b9c3b641a218abcc050e"},
-    {file = "numpy-1.24.4-cp38-cp38-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:dd80e219fd4c71fc3699fc1dadac5dcf4fd882bfc6f7ec53d30fa197b8ee22dc"},
-    {file = "numpy-1.24.4-cp38-cp38-win32.whl", hash = "sha256:4602244f345453db537be5314d3983dbf5834a9701b7723ec28923e2889e0bb2"},
-    {file = "numpy-1.24.4-cp38-cp38-win_amd64.whl", hash = "sha256:692f2e0f55794943c5bfff12b3f56f99af76f902fc47487bdfe97856de51a706"},
-    {file = "numpy-1.24.4-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:2541312fbf09977f3b3ad449c4e5f4bb55d0dbf79226d7724211acc905049400"},
-    {file = "numpy-1.24.4-cp39-cp39-macosx_11_0_arm64.whl", hash = "sha256:9667575fb6d13c95f1b36aca12c5ee3356bf001b714fc354eb5465ce1609e62f"},
-    {file = "numpy-1.24.4-cp39-cp39-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:f3a86ed21e4f87050382c7bc96571755193c4c1392490744ac73d660e8f564a9"},
-    {file = "numpy-1.24.4-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:d11efb4dbecbdf22508d55e48d9c8384db795e1b7b51ea735289ff96613ff74d"},
-    {file = "numpy-1.24.4-cp39-cp39-win32.whl", hash = "sha256:6620c0acd41dbcb368610bb2f4d83145674040025e5536954782467100aa8835"},
-    {file = "numpy-1.24.4-cp39-cp39-win_amd64.whl", hash = "sha256:befe2bf740fd8373cf56149a5c23a0f601e82869598d41f8e188a0e9869926f8"},
-    {file = "numpy-1.24.4-pp38-pypy38_pp73-macosx_10_9_x86_64.whl", hash = "sha256:31f13e25b4e304632a4619d0e0777662c2ffea99fcae2029556b17d8ff958aef"},
-    {file = "numpy-1.24.4-pp38-pypy38_pp73-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:95f7ac6540e95bc440ad77f56e520da5bf877f87dca58bd095288dce8940532a"},
-    {file = "numpy-1.24.4-pp38-pypy38_pp73-win_amd64.whl", hash = "sha256:e98f220aa76ca2a977fe435f5b04d7b3470c0a2e6312907b37ba6068f26787f2"},
-    {file = "numpy-1.24.4.tar.gz", hash = "sha256:80f5e3a4e498641401868df4208b74581206afbee7cf7b8329daae82676d9463"},
-]
-
 [[package]]
 name = "packaging"
 version = "23.2"
@@ -1028,4 +991,4 @@ testing = ["big-O", "jaraco.functools", "jaraco.itertools", "more-itertools", "p
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.8,<3.13"
-content-hash = "8ced8ffd3fb09495d631919b1624509874336ac7ffb5c7eb0566fbea88334b85"
+content-hash = "1df8e3a1b5c0e3b221a0ffee223e32c042e79977d9e7210116555d084d948588"
diff --git a/crates/voicevox_core_python_api/pyproject.toml b/crates/voicevox_core_python_api/pyproject.toml
index b9fca9593..e95777b72 100644
--- a/crates/voicevox_core_python_api/pyproject.toml
+++ b/crates/voicevox_core_python_api/pyproject.toml
@@ -1,7 +1,7 @@
 [project]
 name = "voicevox_core"
 requires-python = ">=3.8"
-dependencies = ["numpy", "pydantic>=1.9.2,<2"]
+dependencies = ["pydantic>=1.9.2,<2"]
 description = "VOICEVOX CORE の Python バインディングです。"
 authors = [{ name = "Hiroshiba", email = "hihokaruta@gmail.com" }]
 classifiers = [
@@ -35,7 +35,6 @@ authors = []
 
 [tool.poetry.dependencies]
 python = ">=3.8,<3.13"
-numpy = ">=1,<2"
 pydantic = ">=1.9.2,<2"
 
 [tool.poetry.group.docs.dependencies]
diff --git a/crates/voicevox_core_python_api/python/test/conftest.py b/crates/voicevox_core_python_api/python/test/conftest.py
index 54449324c..628f4dc56 100644
--- a/crates/voicevox_core_python_api/python/test/conftest.py
+++ b/crates/voicevox_core_python_api/python/test/conftest.py
@@ -1,10 +1,8 @@
 import json
 import os
-from dataclasses import dataclass
 from pathlib import Path
 from typing import List, TypedDict
 
-import numpy as np
 import pytest
 
 root_dir = Path(os.path.dirname(os.path.abspath(__file__)))
diff --git a/crates/voicevox_core_python_api/python/voicevox_core/_rust.pyi b/crates/voicevox_core_python_api/python/voicevox_core/_rust.pyi
index bd110f892..598415d37 100644
--- a/crates/voicevox_core_python_api/python/voicevox_core/_rust.pyi
+++ b/crates/voicevox_core_python_api/python/voicevox_core/_rust.pyi
@@ -1,10 +1,7 @@
 from pathlib import Path
-from typing import TYPE_CHECKING, Dict, Final, List, Literal, Union
+from typing import TYPE_CHECKING, Dict, List, Literal, Union
 from uuid import UUID
 
-import numpy as np
-from numpy.typing import NDArray
-
 if TYPE_CHECKING:
     from voicevox_core import (
         AccelerationMode,
diff --git a/deny.toml b/deny.toml
index b4b4d5872..38e915eb7 100644
--- a/deny.toml
+++ b/deny.toml
@@ -52,7 +52,6 @@ allow-build-scripts = [
     { name = "num-traits", version = "0.2" }, # https://docs.rs/crate/num-traits/0.2/source/build.rs
     { name = "onnxruntime", version = "=0.1.0" }, # https://github.com/VOICEVOX/onnxruntime-rs/blob/405f62fb53df1b59b0e69adafbd1c28e4d5c2787/onnxruntime/build.rs
     { name = "parking_lot_core", version = "0.9" }, # https://docs.rs/crate/parking_lot_core/0.9/source/build.rs
-    { name = "platforms", version = "3" }, # https://docs.rs/crate/platforms/3.0.2/source/build.rs
     { name = "polling", version = "2" }, # https://docs.rs/crate/polling/2/source/build.rs
     { name = "portable-atomic", version = "0.3" }, # https://docs.rs/crate/portable-atomic/0.3.19/source/build.rs
     { name = "proc-macro-error", version = "1" }, # https://docs.rs/crate/proc-macro-error/1/source/build.rs