diff --git a/examples/Cargo.toml b/examples/Cargo.toml
index 5cb5511..34e04c6 100644
--- a/examples/Cargo.toml
+++ b/examples/Cargo.toml
@@ -1,7 +1,9 @@
 [workspace]
+resolver = "2"
 members = [
   "dynamic_threads",
   "free_by_borrow",
   "free_by_gc",
   "static_threads",
+  "tagged_pointer",
 ]
diff --git a/examples/dynamic_threads/Cargo.toml b/examples/dynamic_threads/Cargo.toml
index dcdd5f2..6ddf443 100644
--- a/examples/dynamic_threads/Cargo.toml
+++ b/examples/dynamic_threads/Cargo.toml
@@ -2,7 +2,7 @@
 name = "dynamic_threads"
 version = "0.1.0"
 authors = ["Yota Toyama <raviqqe@gmail.com>"]
-edition = "2018"
+edition = "2021"
 publish = false
 
 [dependencies]
diff --git a/examples/free_by_borrow/Cargo.toml b/examples/free_by_borrow/Cargo.toml
index 9b49a48..79b4828 100644
--- a/examples/free_by_borrow/Cargo.toml
+++ b/examples/free_by_borrow/Cargo.toml
@@ -2,7 +2,7 @@
 name = "free_by_borrow"
 version = "0.1.0"
 authors = ["Yota Toyama <raviqqe@gmail.com>"]
-edition = "2018"
+edition = "2021"
 publish = false
 
 [dependencies]
diff --git a/examples/free_by_gc/Cargo.toml b/examples/free_by_gc/Cargo.toml
index 49d09bd..74ca1a5 100644
--- a/examples/free_by_gc/Cargo.toml
+++ b/examples/free_by_gc/Cargo.toml
@@ -2,7 +2,7 @@
 name = "free_by_gc"
 version = "0.1.0"
 authors = ["Yota Toyama <raviqqe@gmail.com>"]
-edition = "2018"
+edition = "2021"
 publish = false
 
 [dependencies]
diff --git a/examples/static_threads/Cargo.toml b/examples/static_threads/Cargo.toml
index aaa22b7..f6ee965 100644
--- a/examples/static_threads/Cargo.toml
+++ b/examples/static_threads/Cargo.toml
@@ -2,7 +2,7 @@
 name = "static_threads"
 version = "0.1.0"
 authors = ["Yota Toyama <raviqqe@gmail.com>"]
-edition = "2018"
+edition = "2021"
 publish = false
 
 [dependencies]
diff --git a/examples/tagged_pointer/Cargo.toml b/examples/tagged_pointer/Cargo.toml
new file mode 100644
index 0000000..9257097
--- /dev/null
+++ b/examples/tagged_pointer/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "tagged_pointer"
+version = "0.1.0"
+authors = ["Yota Toyama <raviqqe@gmail.com>"]
+edition = "2021"
+publish = false
+
+[dependencies]
+bdwgc-alloc = { path = "../.." }
diff --git a/examples/tagged_pointer/src/main.rs b/examples/tagged_pointer/src/main.rs
new file mode 100644
index 0000000..dda7581
--- /dev/null
+++ b/examples/tagged_pointer/src/main.rs
@@ -0,0 +1,21 @@
+extern crate bdwgc_alloc;
+
+use bdwgc_alloc::Allocator;
+use std::alloc::Layout;
+
+#[global_allocator]
+static GLOBAL_ALLOCATOR: Allocator = Allocator;
+
+fn main() {
+    unsafe { Allocator::initialize() }
+
+    let handle = std::thread::spawn(move || {
+        unsafe { Allocator::register_current_thread().unwrap() }
+
+        loop {
+            unsafe { std::alloc::alloc(Layout::from_size_align(2 ^ 8, 8).unwrap()) };
+        }
+    });
+
+    handle.join().unwrap();
+}