diff --git a/src/dumper.rs b/src/dumper.rs
index b8ec30d..d1c65df 100644
--- a/src/dumper.rs
+++ b/src/dumper.rs
@@ -9,7 +9,7 @@ use libpt::log::{debug, error, trace, warn};
 pub const BYTES_PER_LINE: usize = 16;
 pub const LINE_SEP_HORIZ: char = '─';
 pub const LINE_SEP_VERT: char = '│';
-pub const CHAR_BORDER: &'static str = "|";
+pub const CHAR_BORDER: &str = "|";
 
 pub trait DataSource: Read {
     fn skip(&mut self, length: usize) -> std::io::Result<()>;
@@ -93,16 +93,16 @@ impl Hedu {
         self.display_buf += &format!("{:08X} {LINE_SEP_VERT} ", self.data_idx);
         if self.len != 0 {
             for i in 0..self.len {
-                if i as usize % BYTES_PER_LINE == BYTES_PER_LINE / 2 {
+                if i % BYTES_PER_LINE == BYTES_PER_LINE / 2 {
                     self.display_buf += " ";
                 }
                 self.display_buf += &format!("{:02X} ", self.buf[self.alt_buf][i]);
             }
             if self.len == BYTES_PER_LINE / 2 {
-                self.display_buf += " "
+                self.display_buf += " ";
             }
             for i in 0..(BYTES_PER_LINE - self.len) {
-                if i as usize % BYTES_PER_LINE == BYTES_PER_LINE / 2 {
+                if i % BYTES_PER_LINE == BYTES_PER_LINE / 2 {
                     self.display_buf += " ";
                 }
                 self.display_buf += "   ";
@@ -237,7 +237,7 @@ impl Hedu {
 /// interpret characters for the --chars option
 fn mask_chars(c: char) -> char {
     if c.is_ascii_graphic() {
-        return c;
+        c
     } else if c == '\n' {
         return '↩';
     } else if c == ' ' {
diff --git a/src/main.rs b/src/main.rs
index baa269b..aa0be7c 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -5,13 +5,13 @@
 
 use std::{fs::File, io::IsTerminal, path::PathBuf};
 
-use libpt::log::*;
+use libpt::log::{error, trace, warn, Level, Logger};
 
 use clap::Parser;
 use clap_verbosity_flag::{InfoLevel, Verbosity};
 
 mod dumper;
-use dumper::*;
+use dumper::{DataSource, Hedu};
 
 #[derive(Debug, Clone, Parser)]
 #[command(
@@ -63,7 +63,7 @@ pub struct Cli {
 fn main() {
     let mut cli = cli_parse();
     let mut sources: Vec<Box<dyn DataSource>> = Vec::new();
-    if cli.data_source.len() > 0 && cli.data_source[0] != "-" {
+    if !cli.data_source.is_empty() && cli.data_source[0] != "-" {
         for data_source in &cli.data_source {
             let data_source: PathBuf = PathBuf::from(data_source);
             if data_source.is_dir() {
@@ -89,7 +89,7 @@ fn main() {
         }
         // just for the little header
         cli.data_source = Vec::new();
-        cli.data_source.push(format!("stdin"));
+        cli.data_source.push("stdin".to_string());
         sources.push(Box::new(stdin));
     }
     for (i, source) in sources.iter_mut().enumerate() {
@@ -105,7 +105,7 @@ fn main() {
             }
         }
         match config.dump(&mut **source) {
-            Ok(_) => (),
+            Ok(()) => (),
             Err(err) => {
                 error!("Could not dump data of file: {err}");
                 std::process::exit(3);
@@ -135,5 +135,5 @@ fn cli_parse() -> Cli {
         // less verbose version
         Logger::init_mini(Some(ll)).expect("could not initialize Logger");
     }
-    return cli;
+    cli
 }