diff --git a/Cargo.lock b/Cargo.lock
index 21373bd..a03ea60 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -211,31 +211,6 @@ dependencies = [
  "piper",
 ]
 
-[[package]]
-name = "bon"
-version = "3.8.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ebeb9aaf9329dff6ceb65c689ca3db33dbf15f324909c60e4e5eef5701ce31b1"
-dependencies = [
- "bon-macros",
- "rustversion",
-]
-
-[[package]]
-name = "bon-macros"
-version = "3.8.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "77e9d642a7e3a318e37c2c9427b5a6a48aa1ad55dcd986f3034ab2239045a645"
-dependencies = [
- "darling",
- "ident_case",
- "prettyplease",
- "proc-macro2",
- "quote",
- "rustversion",
- "syn 2.0.111",
-]
-
 [[package]]
 name = "borsh"
 version = "1.6.0"
@@ -346,41 +321,6 @@ version = "0.8.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d0a5c400df2834b80a4c3327b3aad3a4c4cd4de0629063962b03235697506a28"
 
-[[package]]
-name = "darling"
-version = "0.21.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9cdf337090841a411e2a7f3deb9187445851f91b309c0c0a29e05f74a00a48c0"
-dependencies = [
- "darling_core",
- "darling_macro",
-]
-
-[[package]]
-name = "darling_core"
-version = "0.21.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1247195ecd7e3c85f83c8d2a366e4210d588e802133e1e355180a9870b517ea4"
-dependencies = [
- "fnv",
- "ident_case",
- "proc-macro2",
- "quote",
- "strsim",
- "syn 2.0.111",
-]
-
-[[package]]
-name = "darling_macro"
-version = "0.21.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d38308df82d1080de0afee5d069fa14b0326a88c14f15c5ccda35b4a6c414c81"
-dependencies = [
- "darling_core",
- "quote",
- "syn 2.0.111",
-]
-
 [[package]]
 name = "dyn-clone"
 version = "1.0.20"
@@ -457,12 +397,6 @@ version = "2.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "37909eebbb50d72f9059c3b6d82c0463f2ff062c9e95845c43a6c9c0355411be"
 
-[[package]]
-name = "fnv"
-version = "1.0.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
-
 [[package]]
 name = "funty"
 version = "2.0.0"
@@ -544,12 +478,6 @@ version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
 
-[[package]]
-name = "ident_case"
-version = "1.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"
-
 [[package]]
 name = "indexmap"
 version = "2.12.1"
@@ -581,12 +509,9 @@ name = "judge-runner"
 version = "0.1.0"
 dependencies = [
  "anyhow",
- "bon",
  "byte-unit",
  "cgroups-rs",
- "nix 0.30.1",
  "uuid",
- "wait-timeout",
 ]
 
 [[package]]
@@ -718,16 +643,6 @@ dependencies = [
  "zerocopy",
 ]
 
-[[package]]
-name = "prettyplease"
-version = "0.2.37"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "479ca8adacdd7ce8f1fb39ce9ecccbfe93a3f1344b3d0d97f20bc0196208f62b"
-dependencies = [
- "proc-macro2",
- "syn 2.0.111",
-]
-
 [[package]]
 name = "proc-macro-crate"
 version = "3.4.0"
@@ -1044,12 +959,6 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 
-[[package]]
-name = "strsim"
-version = "0.11.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
-
 [[package]]
 name = "syn"
 version = "1.0.109"
@@ -1229,15 +1138,6 @@ version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
 
-[[package]]
-name = "wait-timeout"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "09ac3b126d3914f9849036f826e054cbabdc8519970b8998ddaf3b5bd3c65f11"
-dependencies = [
- "libc",
-]
-
 [[package]]
 name = "wasi"
 version = "0.11.1+wasi-snapshot-preview1"
diff --git a/Cargo.toml b/Cargo.toml
index e530411..7870cf0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,9 +12,6 @@ A code runner library for online judge system
 
 [dependencies]
 anyhow = "1.0.100"
-bon = "3.8.1"
 byte-unit = "5.2.0"
 cgroups-rs = "0.5.0"
-nix = { version = "0.30.1", default-features = false, features = ["signal"] }
 uuid = { version = "1.19.0", features = ["v4", "fast-rng"] }
-wait-timeout = "0.2.1"
diff --git a/src/sandbox/resource.rs b/src/sandbox/resource.rs
index ee3c5e4..2543e86 100644
--- a/src/sandbox/resource.rs
+++ b/src/sandbox/resource.rs
@@ -1,27 +1,25 @@
 use std::time::Duration;
 
-use bon::Builder;
 use byte_unit::Byte;
 use cgroups_rs::fs::{Cgroup, cgroup_builder::CgroupBuilder, hierarchies};
 use uuid::Uuid;
 
 const PREFIX: &str = "judge";
 
-#[derive(Clone, Copy, Builder)]
+#[derive(Clone, Copy)]
 pub struct Resource {
-    #[builder(default = Byte::GIGABYTE)]
     pub memory: Byte,
-
-    #[builder(default = Duration::from_millis(100))]
     pub cpu_quota: Duration,
-
-    #[builder(default = Duration::from_millis(100))]
     pub cpu_period: Duration,
 }
 
 impl Default for Resource {
     fn default() -> Self {
-        Resource::builder().build()
+        Resource {
+            memory: Byte::GIGABYTE,
+            cpu_quota: Duration::from_millis(100),
+            cpu_period: Duration::from_millis(100),
+        }
     }
 }