diff --git a/src/main.rs b/src/main.rs
index badcf04..55e3afc 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -80,7 +80,7 @@ async fn main() -> IoResult<()> {
     };
     hotwatch
         .watch(&config_path, config_watcher)
-        .unwrap_or_else(|_| panic!("failed to watch {:?}", config_path));
+        .unwrap_or_else(|_| panic!("failed to watch {config_path:?}"));
 
     // Create a thread for cleaning up expired files.
     thread::spawn(move || loop {
diff --git a/src/paste.rs b/src/paste.rs
index 34d185c..44e26bb 100644
--- a/src/paste.rs
+++ b/src/paste.rs
@@ -139,7 +139,7 @@ impl Paste {
             .unwrap_or_default()
             .to_string();
         if let Some(timestamp) = expiry_date {
-            path.set_file_name(format!("{}.{}", file_name, timestamp));
+            path.set_file_name(format!("{file_name}.{timestamp}"));
         }
         let mut buffer = File::create(&path)?;
         buffer.write_all(&self.data)?;
@@ -225,7 +225,7 @@ impl Paste {
             .get_path(&config.server.upload_path)
             .join(&file_name);
         if let Some(timestamp) = expiry_date {
-            path.set_file_name(format!("{}.{}", file_name, timestamp));
+            path.set_file_name(format!("{file_name}.{timestamp}"));
         }
         fs::write(&path, url.to_string())?;
         Ok(file_name)
@@ -303,7 +303,7 @@ mod tests {
         let file_name = paste.store_file("test.file", Some(expiry_date), &config)?;
         let file_path = PasteType::Oneshot
             .get_path(&config.server.upload_path)
-            .join(format!("{}.{}", file_name, expiry_date));
+            .join(format!("{file_name}.{expiry_date}"));
         assert_eq!("test", fs::read_to_string(&file_path)?);
         fs::remove_file(file_path)?;
 
diff --git a/src/server.rs b/src/server.rs
index eab55a6..dc0ff3e 100644
--- a/src/server.rs
+++ b/src/server.rs
@@ -454,10 +454,10 @@ mod tests {
         )
         .await;
         assert_eq!(StatusCode::OK, response.status());
-        assert_body(response, &format!("http://localhost:8080/{}\n", file_name)).await?;
+        assert_body(response, &format!("http://localhost:8080/{file_name}\n")).await?;
 
         let serve_request = TestRequest::get()
-            .uri(&format!("/{}", file_name))
+            .uri(&format!("/{file_name}"))
             .to_request();
         let response = test::call_service(&app, serve_request).await;
         assert_eq!(StatusCode::OK, response.status());
@@ -465,7 +465,7 @@ mod tests {
 
         fs::remove_file(file_name)?;
         let serve_request = TestRequest::get()
-            .uri(&format!("/{}", file_name))
+            .uri(&format!("/{file_name}"))
             .to_request();
         let response = test::call_service(&app, serve_request).await;
         assert_eq!(StatusCode::NOT_FOUND, response.status());
@@ -548,10 +548,10 @@ mod tests {
         )
         .await;
         assert_eq!(StatusCode::OK, response.status());
-        assert_body(response, &format!("http://localhost:8080/{}\n", file_name)).await?;
+        assert_body(response, &format!("http://localhost:8080/{file_name}\n")).await?;
 
         let serve_request = TestRequest::get()
-            .uri(&format!("/{}", file_name))
+            .uri(&format!("/{file_name}"))
             .to_request();
         let response = test::call_service(&app, serve_request).await;
         assert_eq!(StatusCode::OK, response.status());
@@ -560,12 +560,12 @@ mod tests {
         thread::sleep(Duration::from_millis(40));
 
         let serve_request = TestRequest::get()
-            .uri(&format!("/{}", file_name))
+            .uri(&format!("/{file_name}"))
             .to_request();
         let response = test::call_service(&app, serve_request).await;
         assert_eq!(StatusCode::NOT_FOUND, response.status());
 
-        if let Some(glob_path) = glob(&format!("{}.[0-9]*", file_name))
+        if let Some(glob_path) = glob(&format!("{file_name}.[0-9]*"))
             .map_err(error::ErrorInternalServerError)?
             .next()
         {
@@ -605,10 +605,10 @@ mod tests {
         )
         .await;
         assert_eq!(StatusCode::OK, response.status());
-        assert_body(response, &format!("http://localhost:8080/{}\n", file_name)).await?;
+        assert_body(response, &format!("http://localhost:8080/{file_name}\n")).await?;
 
         let serve_request = TestRequest::get()
-            .uri(&format!("/{}", file_name))
+            .uri(&format!("/{file_name}"))
             .to_request();
         let response = test::call_service(&app, serve_request).await;
         assert_eq!(StatusCode::OK, response.status());
@@ -623,7 +623,7 @@ mod tests {
         fs::remove_file(file_name)?;
 
         let serve_request = TestRequest::get()
-            .uri(&format!("/{}", file_name))
+            .uri(&format!("/{file_name}"))
             .to_request();
         let response = test::call_service(&app, serve_request).await;
         assert_eq!(StatusCode::NOT_FOUND, response.status());
@@ -695,24 +695,24 @@ mod tests {
         )
         .await;
         assert_eq!(StatusCode::OK, response.status());
-        assert_body(response, &format!("http://localhost:8080/{}\n", file_name)).await?;
+        assert_body(response, &format!("http://localhost:8080/{file_name}\n")).await?;
 
         let serve_request = TestRequest::get()
-            .uri(&format!("/{}", file_name))
+            .uri(&format!("/{file_name}"))
             .to_request();
         let response = test::call_service(&app, serve_request).await;
         assert_eq!(StatusCode::OK, response.status());
         assert_body(response, &timestamp).await?;
 
         let serve_request = TestRequest::get()
-            .uri(&format!("/{}", file_name))
+            .uri(&format!("/{file_name}"))
             .to_request();
         let response = test::call_service(&app, serve_request).await;
         assert_eq!(StatusCode::NOT_FOUND, response.status());
 
         if let Some(glob_path) = glob(
             &oneshot_upload_path
-                .join(format!("{}.[0-9]*", file_name))
+                .join(format!("{file_name}.[0-9]*"))
                 .to_string_lossy(),
         )
         .map_err(error::ErrorInternalServerError)?
diff --git a/src/util.rs b/src/util.rs
index 93fce27..d4126e2 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -94,7 +94,7 @@ pub fn sha256_digest<R: Read>(input: R) -> Result<String, ActixError> {
         .iter()
         .collect::<Vec<&u8>>()
         .iter()
-        .map(|byte| format!("{:02x}", byte))
+        .map(|byte| format!("{byte:02x}"))
         .collect::<String>())
 }
 
@@ -148,7 +148,7 @@ mod tests {
     fn test_get_expired_files() -> Result<(), ActixError> {
         let current_dir = env::current_dir()?;
         let expiration_time = get_system_time()?.as_millis() + 50;
-        let path = PathBuf::from(format!("expired.file2.{}", expiration_time));
+        let path = PathBuf::from(format!("expired.file2.{expiration_time}"));
         fs::write(&path, String::new())?;
         assert_eq!(Vec::<PathBuf>::new(), get_expired_files(&current_dir));
         thread::sleep(Duration::from_millis(75));