Index: Cargo.toml
==================================================================
--- Cargo.toml
+++ Cargo.toml
@@ -1,8 +1,8 @@
 [package]
 name = "dupnamegen"
-version = "0.1.1"
+version = "0.2.0"
 edition = "2021"
 license = "0BSD"
 # https://crates.io/category_slugs
 categories = [ "filesystem" ]
 keywords = [ "filename", "generator" ]

Index: src/lib.rs
==================================================================
--- src/lib.rs
+++ src/lib.rs
@@ -53,19 +53,19 @@
 /// as an utf-8 string.
 pub fn namegen<P>(
   p: P,
   naming: Naming,
   start_idx: usize
-) -> Result<Box<dyn FnMut() -> PathBuf>, Error>
+) -> Result<Box<dyn FnMut() -> PathBuf + Send>, Error>
 where
   P: AsRef<Path>
 {
   fn inner(
     p: &Path,
     naming: Naming,
     start_idx: usize
-  ) -> Result<Box<dyn FnMut() -> PathBuf>, Error> {
+  ) -> Result<Box<dyn FnMut() -> PathBuf + Send>, Error> {
     let dir = p.parent().map(ToOwned::to_owned);
     let fname = p
       .file_name()
       .ok_or(Error::BadPath)?
       .to_str()
@@ -85,11 +85,11 @@
 
 fn winlike(
   dir: Option<PathBuf>,
   fname: String,
   start_idx: usize
-) -> Box<dyn FnMut() -> PathBuf> {
+) -> Box<dyn FnMut() -> PathBuf + Send> {
   // Find last `.' that is not at the first position
   // If no '.' -- stick the counter at the end
   let insert_at = fname.rfind('.').map_or(fname.len(), |idx| {
     if idx == 0 {
       // found a dot at first the very beginning
@@ -118,11 +118,11 @@
 
 fn firefoxlike(
   dir: Option<PathBuf>,
   fname: String,
   start_idx: usize
-) -> Box<dyn FnMut() -> PathBuf> {
+) -> Box<dyn FnMut() -> PathBuf + Send> {
   let insert_at = firefoxlike_find_index(&fname);
 
   let mut idx = start_idx;
   Box::new(move || {
     let mut nm = fname.clone();
@@ -184,11 +184,11 @@
 
 fn dashnum(
   dir: Option<PathBuf>,
   fname: String,
   start_idx: usize
-) -> Box<dyn FnMut() -> PathBuf> {
+) -> Box<dyn FnMut() -> PathBuf + Send> {
   let mut idx = start_idx;
   Box::new(move || {
     let nm = format!("{fname}-{idx}");
     idx += 1;
     if let Some(ref dir) = dir {

Index: www/changelog.md
==================================================================
--- www/changelog.md
+++ www/changelog.md
@@ -2,18 +2,28 @@
 
 ⚠️  indicates a breaking change.
 
 ## [Unreleased]
 
-[Details](/vdiff?from=dupnamegen-0.1.1&to=trunk)
+[Details](/vdiff?from=dupnamegen-0.2.0&to=trunk)
 
 ### Added
 
 ### Changed
 
 ### Removed
 
+---
+
+## [0.2.0] - 2024-10-14
+
+[Details](/vdiff?from=dupnamegen-0.1.1&to=dupnamegen-0.2.0)
+
+### Changed
+
+- ⚠️ Add a `Send` bound to returned name generator closure.
+
 ---
 
 ## [0.1.1] - 2024-10-14
 
 [Details](/vdiff?from=dupnamegen-0.1.0&to=dupnamegen-0.1.1)

Index: www/index.md
==================================================================
--- www/index.md
+++ www/index.md
@@ -8,17 +8,17 @@
 _dupnamegen_ supports three different naming conventions for generating new
 file names.
 
 - Windows-like
   - `Foo.zip` → `Foo (1).zip`
-  - `lua-5.4.7.tar.gz` -> `lua-5.4.7.tar (1).gz`
+  - `lua-5.4.7.tar.gz` → `lua-5.4.7.tar (1).gz`
 - Firefox-like
-  - `Foo.zip" → `Foo(1).zip`
-  - `lua-5.4.7.tar.gz` -> `lua-5.4.7(1).tar.gz`
+  - `Foo.zip` → `Foo(1).zip`
+  - `lua-5.4.7.tar.gz` → `lua-5.4.7(1).tar.gz`
 - Dash-num
-  - `Foo.zip" → `Foo.zip-1`
-  - `lua-5.4.7.tar.gz` -> `lua-5.4.7.tar.gz-1`
+  - `Foo.zip` → `Foo.zip-1`
+  - `lua-5.4.7.tar.gz` → `lua-5.4.7.tar.gz-1`
 
 
 ## Change log
 
 The details of changes can always be found in the timeline, but for a