diff --git a/Cargo.lock b/Cargo.lock
index b1e4315..cb6c53f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -68,15 +68,6 @@ dependencies = [
  "riscv-rt-macros",
 ]
 
-[[package]]
-name = "lazy_static"
-version = "1.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
-dependencies = [
- "spin",
-]
-
 [[package]]
 name = "lock_api"
 version = "0.4.12"
@@ -181,7 +172,6 @@ dependencies = [
  "fast-trap",
  "hpm-metapac",
  "hpm-rt",
- "lazy_static",
  "riscv 0.10.1",
  "riscv-decode",
  "rustsbi",
diff --git a/Cargo.toml b/Cargo.toml
index bff9481..8c910a6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,7 +15,6 @@ riscv = "0.10"
 spin = "0.9"
 fast-trap = { version = "0.0.1", features = ["riscv-m"] }
 riscv-decode = "0.2.1"
-lazy_static = { version = "1.5.0", features = ["spin_no_std"] }
 
 [build-dependencies]
 hpm-rt = { git = "https://github.com/hpm-rs/hpm-rt.git", rev = "66ffb7d7a65d7251d0b47db9599d36cefc4d6703" }
diff --git a/src/extension.rs b/src/extension.rs
index cc6b1d7..b17581f 100644
--- a/src/extension.rs
+++ b/src/extension.rs
@@ -1,4 +1,5 @@
 use rustsbi::RustSBI;
+use spin::Lazy;
 
 use crate::board::{board_init_timer, MachineTimer};
 
@@ -8,10 +9,6 @@ pub struct FixedRustSBI {
     pub timer: MachineTimer,
 }
 
-lazy_static! {
-    pub static ref SBI: FixedRustSBI = {
-        FixedRustSBI {
-            timer: board_init_timer(),
-        }
-    };
-}
+pub static SBI: Lazy<FixedRustSBI> = Lazy::new(|| FixedRustSBI {
+    timer: board_init_timer(),
+});
diff --git a/src/main.rs b/src/main.rs
index e3235b1..76e4dc5 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -3,9 +3,6 @@
 #![feature(naked_functions, asm_const)]
 #![deny(warnings)]
 
-#[macro_use]
-extern crate lazy_static;
-
 mod board;
 mod extension;
 mod loader;