diff --git a/Cargo.toml b/Cargo.toml
index c1f7a00..ba24fad 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,14 +2,14 @@
 authors = ["imbolc"]
 categories = ["web-programming"]
 description = "Cookie manager middleware for tower."
-edition = "2018"
+edition = "2021"
 homepage = "https://github.com/imbolc/tower-cookies"
 keywords = ["axum", "cookie", "cookies", "tower"]
 license = "MIT"
 name = "tower-cookies"
 readme = "README.md"
 repository = "https://github.com/imbolc/tower-cookies"
-version = "0.4.0"
+version = "0.4.1"
 
 [features]
 default = ["axum-core"]
diff --git a/src/lib.rs b/src/lib.rs
index b9c0fc4..8b2dfcc 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -179,7 +179,7 @@ impl Inner {
                 .header
                 .as_ref()
                 .and_then(|h| std::str::from_utf8(h.as_bytes()).ok())
-                .map(|s| jar_from_str(s))
+                .map(jar_from_str)
                 .unwrap_or_default();
             self.jar = Some(jar);
         }