diff --git a/01-echo/Cargo.lock b/01-echo/Cargo.lock
index 0529ce7..ad50405 100644
--- a/01-echo/Cargo.lock
+++ b/01-echo/Cargo.lock
@@ -2,46 +2,12 @@
 # It is not intended for manual editing.
 version = 3
 
-[[package]]
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-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
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-
 [[package]]
 name = "ch01-echo"
 version = "0.1.0"
 dependencies = [
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- "tokio",
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-dependencies = [
- "libc",
 ]
 
 [[package]]
@@ -50,82 +16,6 @@ version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "453ad9f582a441959e5f0d088b02ce04cfe8d51a8eaf077f12ac6d3e94164ca6"
 
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-]
-
-[[package]]
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-dependencies = [
- "cfg-if",
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- "smallvec",
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-
 [[package]]
 name = "proc-macro2"
 version = "1.0.56"
@@ -144,27 +34,12 @@ dependencies = [
  "proc-macro2",
 ]
 
-[[package]]
-name = "redox_syscall"
-version = "0.2.16"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fb5a58c1855b4b6819d59012155603f0b22ad30cad752600aadfcb695265519a"
-dependencies = [
- "bitflags",
-]
-
 [[package]]
 name = "ryu"
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 checksum = "f91339c0467de62360649f8d3e185ca8de4224ff281f66000de5eb2a77a79041"
 
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-checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
-
 [[package]]
 name = "serde"
 version = "1.0.160"
@@ -196,31 +71,6 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "signal-hook-registry"
-version = "1.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d8229b473baa5980ac72ef434c4415e70c4b5e71b423043adb4ba059f89c99a1"
-dependencies = [
- "libc",
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-dependencies = [
- "libc",
- "winapi",
-]
-
 [[package]]
 name = "syn"
 version = "2.0.15"
@@ -232,198 +82,8 @@ dependencies = [
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 ]
 
-[[package]]
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-version = "1.28.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
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- "libc",
- "mio",
- "num_cpus",
- "parking_lot",
- "pin-project-lite",
- "signal-hook-registry",
- "socket2",
- "tokio-macros",
- "windows-sys 0.48.0",
-]
-
-[[package]]
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-
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-
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-
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-
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diff --git a/01-echo/Cargo.toml b/01-echo/Cargo.toml
index 451f469..97decca 100644
--- a/01-echo/Cargo.toml
+++ b/01-echo/Cargo.toml
@@ -3,9 +3,6 @@ name = "ch01-echo"
 version = "0.1.0"
 edition = "2021"
 
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
 [dependencies]
-tokio = {version = "1", features = ["full"]}
 serde = {version = "1", features = ["derive"] }
 serde_json = "1"
diff --git a/02-unique-id/Cargo.lock b/02-unique-id/Cargo.lock
index 70e486c..8157b7c 100644
--- a/02-unique-id/Cargo.lock
+++ b/02-unique-id/Cargo.lock
@@ -2,24 +2,6 @@
 # It is not intended for manual editing.
 version = 3
 
-[[package]]
-name = "autocfg"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
-
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
-
-[[package]]
-name = "bytes"
-version = "1.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "89b2fd2a0dcf38d7971e2194b6b6eebab45ae01067456a7fd93d5547a61b70be"
-
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
@@ -32,7 +14,6 @@ version = "0.1.0"
 dependencies = [
  "serde",
  "serde_json",
- "tokio",
  "uuid7",
 ]
 
@@ -53,15 +34,6 @@ dependencies = [
  "wasi",
 ]
 
-[[package]]
-name = "hermit-abi"
-version = "0.2.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee512640fe35acbfb4bb779db6f0d80704c2cacfa2e39b601ef3e3f47d1ae4c7"
-dependencies = [
- "libc",
-]
-
 [[package]]
 name = "itoa"
 version = "1.0.6"
@@ -74,76 +46,6 @@ version = "0.2.142"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6a987beff54b60ffa6d51982e1aa1146bc42f19bd26be28b0586f252fccf5317"
 
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-dependencies = [
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- "scopeguard",
-]
-
-[[package]]
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-dependencies = [
- "cfg-if",
-]
-
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-checksum = "5b9d9a46eff5b4ff64b45a9e316a6d1e0bc719ef429cbec4dc630684212bfdf9"
-dependencies = [
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- "wasi",
- "windows-sys 0.45.0",
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-dependencies = [
- "hermit-abi",
- "libc",
-]
-
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3742b2c103b9f06bc9fff0a37ff4912935851bee6d36f3c02bcc755bcfec228f"
-dependencies = [
- "lock_api",
- "parking_lot_core",
-]
-
-[[package]]
-name = "parking_lot_core"
-version = "0.9.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9069cbb9f99e3a5083476ccb29ceb1de18b9118cafa53e90c9551235de2b9521"
-dependencies = [
- "cfg-if",
- "libc",
- "redox_syscall",
- "smallvec",
- "windows-sys 0.45.0",
-]
-
-[[package]]
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-version = "0.2.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e0a7ae3ac2f1173085d398531c705756c94a4c56843785df85a60c1a0afac116"
-
 [[package]]
 name = "ppv-lite86"
 version = "0.2.17"
@@ -198,27 +100,12 @@ dependencies = [
  "getrandom",
 ]
 
-[[package]]
-name = "redox_syscall"
-version = "0.2.16"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fb5a58c1855b4b6819d59012155603f0b22ad30cad752600aadfcb695265519a"
-dependencies = [
- "bitflags",
-]
-
 [[package]]
 name = "ryu"
 version = "1.0.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f91339c0467de62360649f8d3e185ca8de4224ff281f66000de5eb2a77a79041"
 
-[[package]]
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-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
-
 [[package]]
 name = "serde"
 version = "1.0.160"
@@ -250,31 +137,6 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "signal-hook-registry"
-version = "1.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
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@@ -286,36 +148,6 @@ dependencies = [
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- "socket2",
- "tokio-macros",
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-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
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-
 [[package]]
 name = "unicode-ident"
 version = "1.0.8"
@@ -338,157 +170,3 @@ name = "wasi"
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 checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
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-
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-checksum = "7896dbc1f41e08872e9d5e8f8baa8fdd2677f29468c4e156210174edc7f7b953"
-
-[[package]]
-name = "windows_x86_64_msvc"
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-checksum = "9aec5da331524158c6d1a4ac0ab1541149c0b9505fde06423b02f5ef0106b9f0"
-
-[[package]]
-name = "windows_x86_64_msvc"
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diff --git a/02-unique-id/Cargo.toml b/02-unique-id/Cargo.toml
index c60d3b9..382235f 100644
--- a/02-unique-id/Cargo.toml
+++ b/02-unique-id/Cargo.toml
@@ -6,7 +6,6 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-tokio = {version = "1", features = ["full"]}
 serde = {version = "1", features = ["derive"] }
 serde_json = "1"
 uuid7 = { version = "0.6.2", features = ["serde"] }
\ No newline at end of file