diff --git a/src/builder.rs b/src/builder.rs
index 2734394..b316eb2 100644
--- a/src/builder.rs
+++ b/src/builder.rs
@@ -42,10 +42,6 @@ impl ServerBuilder {
     }
 
     fn update_ip_filter_state(&mut self) {
-        if self.config.private_ips || !self.config.ips.is_empty() {
-            self.config.ip_filter = true;
-        } else {
-            self.config.ip_filter = false;
-        }
+        self.config.ip_filter = self.config.private_ips || !self.config.ips.is_empty();
     }
 }
diff --git a/src/main.rs b/src/main.rs
index 6d4add3..17bb486 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -16,5 +16,5 @@ async fn main() {
 }
 
 async fn handler(req: Request<Incoming>) -> Result<Response<Full<Bytes>>, Infallible> {
-    Responder::text(format!("Hello World! {}", req.uri()))
+    Responder::text(&format!("Hello World! {}", req.uri()))
 }
diff --git a/src/responder.rs b/src/responder.rs
index cb59202..50cf549 100644
--- a/src/responder.rs
+++ b/src/responder.rs
@@ -8,18 +8,18 @@ pub struct Responder;
 
 impl Responder {
     pub fn not_found() -> Result<Response<Full<Bytes>>, Infallible> {
-        Self::response_using_builder(Self::create_builder(401), "Not Found".to_string())
+        Self::response_using_builder(Self::create_builder(404), "Not Found")
     }
 
     pub fn unathorized() -> Result<Response<Full<Bytes>>, Infallible> {
-        Self::response_using_builder(Self::create_builder(401), "Unathorized".to_string())
+        Self::response_using_builder(Self::create_builder(401), "Unathorized")
     }
 
-    pub fn text(response: String) -> Result<Response<Full<Bytes>>, Infallible> {
+    pub fn text(response: &str) -> Result<Response<Full<Bytes>>, Infallible> {
         Self::response_using_builder(Self::create_builder(200), response)
     }
 
-    pub fn json<T>(json: T) -> Result<Response<Full<Bytes>>, Infallible>
+    pub fn json<T>(json: &T) -> Result<Response<Full<Bytes>>, Infallible>
     where
         T: Serialize,
     {
@@ -28,25 +28,27 @@ impl Responder {
 
     pub fn text_using_status(
         status: u16,
-        response: String,
+        response: &str,
     ) -> Result<Response<Full<Bytes>>, Infallible> {
         Self::response_using_builder(Self::create_builder(status), response)
     }
 
-    pub fn json_using_status<T>(status: u16, json: T) -> Result<Response<Full<Bytes>>, Infallible>
+    pub fn json_using_status<T>(status: u16, json: &T) -> Result<Response<Full<Bytes>>, Infallible>
     where
         T: Serialize,
     {
         let builder = Self::create_builder(status).header(CONTENT_TYPE, "application/json");
 
-        Self::response_using_builder(builder, serde_json::to_string(&json).unwrap())
+        Self::response_using_builder(builder, &serde_json::to_string(json).unwrap())
     }
 
     fn response_using_builder(
         builder: Builder,
-        response: String,
+        response: &str,
     ) -> Result<Response<Full<Bytes>>, Infallible> {
-        Ok(builder.body(Full::new(Bytes::from(response))).unwrap())
+        Ok(builder
+            .body(Full::<Bytes>::from(response.to_string()))
+            .unwrap())
     }
 
     fn create_builder(status: u16) -> Builder {