diff --git a/Cargo.lock b/Cargo.lock
index 6b3ff197..b8ac451c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1424,7 +1424,6 @@ name = "picky-asn1-der"
 version = "0.5.3"
 dependencies = [
  "base64",
- "lazy_static",
  "num-bigint-dig",
  "oid",
  "picky-asn1",
diff --git a/picky-asn1-der/Cargo.toml b/picky-asn1-der/Cargo.toml
index 68733e0a..777fc3c0 100644
--- a/picky-asn1-der/Cargo.toml
+++ b/picky-asn1-der/Cargo.toml
@@ -20,7 +20,6 @@ include = ["src/**/*", "README.md", "CHANGELOG.md", "LICENSE-*"]
 picky-asn1 = { version = "0.10", path = "../picky-asn1" }
 serde = { version = "1", default-features = false, features = ["derive"] }
 serde_bytes = "0.11"
-lazy_static = { version = "1.5", optional = true }
 
 [dev-dependencies]
 base64 = "0.22"
@@ -30,4 +29,4 @@ num-bigint-dig = "0.8"# TODO: use `crypto-bigint` instead
 oid = { version = "0.2", default-features = false, features = ["serde_support"] }
 
 [features]
-debug_log = ["lazy_static"]
+debug_log = []
diff --git a/picky-asn1-der/src/debug_log.rs b/picky-asn1-der/src/debug_log.rs
index 7367d8e4..68c4b525 100644
--- a/picky-asn1-der/src/debug_log.rs
+++ b/picky-asn1-der/src/debug_log.rs
@@ -8,12 +8,10 @@ macro_rules! debug_log {
 #[macro_use]
 pub mod internal {
     use std::collections::HashMap;
-    use std::sync::Mutex;
+    use std::sync::{LazyLock, Mutex};
     use std::thread::ThreadId;
 
-    lazy_static::lazy_static! {
-        pub static ref CTX: Mutex<HashMap<ThreadId, u8>> = Mutex::new(HashMap::new());
-    }
+    pub static CTX: LazyLock<Mutex<HashMap<ThreadId, u8>>> = LazyLock::new(|| Mutex::new(HashMap::new()));
 
     pub struct Identer;
     impl Identer {