diff --git a/Cargo.lock b/Cargo.lock
index 5d32730..02ba1be 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -535,19 +535,31 @@ dependencies = [
 
 [[package]]
 name = "chrono-tz"
-version = "0.5.3"
+version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2554a3155fec064362507487171dcc4edc3df60cb10f3a1fb10ed8094822b120"
+checksum = "64c01c1c607d25c71bbaa67c113d6c6b36c434744b4fd66691d711b5b1bc0c8b"
 dependencies = [
  "chrono",
+ "chrono-tz-build",
+ "phf",
+]
+
+[[package]]
+name = "chrono-tz-build"
+version = "0.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "db058d493fb2f65f41861bfed7e3fe6335264a9f0f92710cab5bdf01fef09069"
+dependencies = [
  "parse-zoneinfo",
+ "phf",
+ "phf_codegen",
 ]
 
 [[package]]
 name = "clap"
-version = "3.0.0-beta.4"
+version = "3.0.0-beta.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fcd70aa5597dbc42f7217a543f9ef2768b2ef823ba29036072d30e1d88e98406"
+checksum = "feff3878564edb93745d58cf63e17b63f24142506e7a20c87a5521ed7bfb1d63"
 dependencies = [
  "atty",
  "bitflags",
@@ -559,14 +571,14 @@ dependencies = [
  "termcolor",
  "terminal_size",
  "textwrap",
- "vec_map",
+ "unicase",
 ]
 
 [[package]]
 name = "clap_derive"
-version = "3.0.0-beta.4"
+version = "3.0.0-beta.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b5bb0d655624a0b8770d1c178fb8ffcb1f91cc722cb08f451e3dc72465421ac"
+checksum = "8b15c6b4f786ffb6192ffe65a36855bc1fc2444bcd0945ae16748dcd6ed7d0d3"
 dependencies = [
  "heck",
  "proc-macro-error",
@@ -1312,9 +1324,12 @@ checksum = "624a8340c38c1b80fd549087862da4ba43e08858af025b236e509b6649fc13d5"
 
 [[package]]
 name = "os_str_bytes"
-version = "3.1.0"
+version = "4.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6acbef58a60fe69ab50510a55bc8cdd4d6cf2283d27ad338f54cb52747a9cf2d"
+checksum = "addaa943333a514159c80c97ff4a93306530d965d27e139188283cd13e06a799"
+dependencies = [
+ "memchr",
+]
 
 [[package]]
 name = "parking_lot"
@@ -1399,6 +1414,45 @@ dependencies = [
  "sha-1 0.8.2",
 ]
 
+[[package]]
+name = "phf"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b9fc3db1018c4b59d7d582a739436478b6035138b6aecbce989fc91c3e98409f"
+dependencies = [
+ "phf_shared",
+]
+
+[[package]]
+name = "phf_codegen"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4fb1c3a8bc4dd4e5cfce29b44ffc14bedd2ee294559a294e2a4d4c9e9a6a13cd"
+dependencies = [
+ "phf_generator",
+ "phf_shared",
+]
+
+[[package]]
+name = "phf_generator"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d5285893bb5eb82e6aaf5d59ee909a06a16737a8970984dd7746ba9283498d6"
+dependencies = [
+ "phf_shared",
+ "rand 0.8.4",
+]
+
+[[package]]
+name = "phf_shared"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6796ad771acdc0123d2a88dc428b5e38ef24456743ddb1744ed628f9815c096"
+dependencies = [
+ "siphasher",
+ "uncased",
+]
+
 [[package]]
 name = "pin-project"
 version = "0.4.28"
@@ -1846,6 +1900,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "siphasher"
+version = "0.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "533494a8f9b724d33625ab53c6c4800f7cc445895924a8ef649222dcb76e938b"
+
 [[package]]
 name = "slab"
 version = "0.4.4"
@@ -1984,9 +2044,9 @@ dependencies = [
 
 [[package]]
 name = "tera"
-version = "1.12.1"
+version = "1.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bf95b0d8a46da5fe3ea119394a6c7f1e745f9de359081641c99946e2bf55d4f2"
+checksum = "ed0c0eee8fbbbaab449287574b292f21ca53224b92a07b4a23266b77376f0ce7"
 dependencies = [
  "chrono",
  "chrono-tz",
@@ -2272,6 +2332,15 @@ version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "56dee185309b50d1f11bfedef0fe6d036842e3fb77413abef29f8f8d1c5d4c1c"
 
+[[package]]
+name = "uncased"
+version = "0.9.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5baeed7327e25054889b9bd4f975f32e5f4c5d434042d59ab6cd4142c0a76ed0"
+dependencies = [
+ "version_check 0.9.3",
+]
+
 [[package]]
 name = "unic-char-property"
 version = "0.9.0"
@@ -2420,12 +2489,6 @@ dependencies = [
  "v_escape",
 ]
 
-[[package]]
-name = "vec_map"
-version = "0.8.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
-
 [[package]]
 name = "version_check"
 version = "0.1.5"
diff --git a/Cargo.toml b/Cargo.toml
index 7551677..037a527 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,16 +11,16 @@ actix-http = "2.2"
 actix-web = {version = "3.3", features = ["rustls"]}
 actix-web-httpauth = "0.5"
 chrono = "0.4"
-clap = {version = "3.0.0-beta.4", features = ["wrap_help", "color"]}
+clap = {version = "3.0.0-beta.5", features = ["wrap_help", "color"]}
 env_logger = "0.9"
 lazy_static = "1.4"
 log = "0.4"
-mime_guess = "2"
+mime_guess = "2.0"
 regex = "1.5"
 rustls = "0.18"
-serde = "1"
+serde = "1.0"
 sha2 = "0.9"
-tera = "1"
+tera = "1.13"
 toml = "0.5"
 urlencoding = "2.1"
 
diff --git a/src/main.rs b/src/main.rs
index 6802de5..65f7943 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -12,6 +12,7 @@ use actix_web::{
     dev::{self, Service, ServiceResponse},
     http, middleware, App, HttpResponse, HttpServer,
 };
+use clap::Arg;
 use env_logger::fmt::Color;
 use log::{error, info};
 use sha2::Digest;
@@ -342,102 +343,74 @@ async fn validator(
 
 #[actix_web::main]
 async fn main() -> std::io::Result<()> {
-    let matches = clap_app!((crate_name!()) =>
-        (version: crate_version!())
-        (author: crate_authors!())
-        (about: crate_description!())
-        (@arg noindex: --noindex "Disable automatic index page generation")
-        (@arg compress: -c --compress "Enable streaming compression (Content-length/segment download will be disabled)")
-        // (@arg upload: -u --upload "Enable file upload")
-        (@arg nocache: --nocache "Disable HTTP cache")
-        (@arg nocolor: --nocolor "Disable cli colors")
-        (@arg cors: --cors [VALUE] min_values(0) max_values(1) "Enable CORS")
-        (@arg spa: --spa "Enable Single-Page Application mode (always serve /index.html when the file is not found)")
-        (@arg dotfiles: -d --dotfiles "Show dotfiles")
-        (@arg open: -o --open "Open the page in the default browser")
-        (@arg quiet: -q --quiet "Disable access log output")
-        (@arg quietall: --quietall "Disable all output")
-        (@arg ROOT: default_value["."] {
-            |path| match std::fs::metadata(path) {
-                Ok(meta) => {
-                    if meta.is_dir() {
-                        Ok(())
-                    } else {
-                        Err("Parameter is not a directory".to_owned())
-                    }
-                }
-                Err(e) => Err(e.to_string()),
+    let check_does_dir_exits = |path: &str| match std::fs::metadata(path) {
+        Ok(meta) => {
+            if meta.is_dir() {
+                Ok(())
+            } else {
+                Err("Parameter is not a directory".to_owned())
             }
-        } "Root directory")
-        (@arg address: -a --address +takes_value default_value["0.0.0.0"] {
-            |s| match IpAddr::from_str(s) {
-                Ok(_) => Ok(()),
-                Err(e) => Err(e.to_string()),
+        }
+        Err(e) => Err(e.to_string()),
+    };
+    let check_does_file_exits = |path: &str| match std::fs::metadata(path) {
+        Ok(metadata) => {
+            if metadata.is_file() {
+                Ok(())
+            } else {
+                Err("Parameter is not a file".to_owned())
             }
-        } "IP address to serve on")
-        (@arg port: -p --port +takes_value default_value["8000"] {
-            |s| match s.parse::<u16>() {
-                Ok(_) => Ok(()),
-                Err(e) => Err(e.to_string()),
-            }
-        } "Port to serve on")
-        (@arg auth: --auth +takes_value {
-            |s| {
-                let parts = s.splitn(2, ':').collect::<Vec<&str>>();
-                if parts.len() < 2 || parts.len() >= 2 && parts[1].is_empty() {
-                    Err("Password not found".to_owned())
-                } else if parts[0].is_empty() {
-                    Err("Username not found".to_owned())
-                } else {
-                    Ok(())
-                }
-            }
-        } "HTTP Auth (username:password)")
-        (@arg cert: --cert +takes_value {
-            |s| match std::fs::metadata(s) {
-                Ok(metadata) => {
-                    if metadata.is_file() {
-                        Ok(())
-                    } else {
-                        Err("Parameter is not a file".to_owned())
-                    }
-                }
-                Err(e) => Err(e.to_string()),
-            }
-        } "Path of TLS/SSL public key (certificate)")
-        (@arg key: --key +takes_value {
-            |s| match std::fs::metadata(s) {
-                Ok(metadata) => {
-                    if metadata.is_file() {
-                        Ok(())
-                    } else {
-                        Err("Parameter is not a file".to_owned())
-                    }
-                }
-                Err(e) => Err(e.to_string()),
-            }
-        } "Path of TLS/SSL private key")
-        (@subcommand doc =>
-            (about: "Open cargo doc via local server (Need cargo installation)")
-            (@arg nocolor: --nocolor "Disable cli colors")
-            (@arg noopen: -no --noopen "Do not open the page in the default browser")
-            (@arg log: --log "Enable access log output [default: false]")
-            (@arg quietall: --quietall "Disable all output")
-            (@arg address: -a --address +takes_value default_value["0.0.0.0"] {
-                |s| match IpAddr::from_str(s) {
-                    Ok(_) => Ok(()),
-                    Err(e) => Err(e.to_string()),
-                }
-            } "IP address to serve on")
-            (@arg port: -p --port +takes_value default_value["8000"] {
-                |s| match s.parse::<u16>() {
-                    Ok(_) => Ok(()),
-                    Err(e) => Err(e.to_string()),
-                }
-            } "Port to serve on")
+        }
+        Err(e) => Err(e.to_string()),
+    };
+    let check_is_ip_addr = |s: &str| match IpAddr::from_str(s) {
+        Ok(_) => Ok(()),
+        Err(e) => Err(e.to_string()),
+    };
+    let check_is_port_num = |s: &str| match s.parse::<u16>() {
+        Ok(_) => Ok(()),
+        Err(e) => Err(e.to_string()),
+    };
+    let check_is_auth = |s: &str| {
+        let parts = s.splitn(2, ':').collect::<Vec<&str>>();
+        if parts.len() < 2 || parts.len() >= 2 && parts[1].is_empty() {
+            Err("Password not found".to_owned())
+        } else if parts[0].is_empty() {
+            Err("Username not found".to_owned())
+        } else {
+            Ok(())
+        }
+    };
+    let matches = clap::App::new(crate_name!())
+        .version(crate_version!())
+        .author(crate_authors!())
+        .about(crate_description!())
+        .arg(Arg::new("noindex").long("noindex").about("Disable automatic index page generation"))
+        .arg(Arg::new("compress").short('c').long("compress").about("Enable streaming compression (Content-length/segment download will be disabled)"))
+        .arg(Arg::new("nocache").long("nocache").about("Disable HTTP cache"))
+        .arg(Arg::new("nocolor").long("nocolor").about("Disable cli colors"))
+        .arg(Arg::new("cors").long("cors").takes_value(true).min_values(0).max_values(1).about("Enable CORS [with custom value]"))
+        .arg(Arg::new("spa").long("spa").about("Enable Single-Page Application mode (always serve /index.html when the file is not found)"))
+        .arg(Arg::new("dotfiles").short('d').long("dotfiles").about("Show dotfiles"))
+        .arg(Arg::new("open").short('o').long("open").about("Open the page in the default browser"))
+        .arg(Arg::new("quiet").short('q').long("quiet").about("Disable access log output"))
+        .arg(Arg::new("quietall").long("quietall").about("Disable all output"))
+        .arg(Arg::new("ROOT").default_value(".").validator(check_does_dir_exits).about("Root directory"))
+        .arg(Arg::new("address").short('a').long("address").default_value("0.0.0.0").takes_value(true).validator(check_is_ip_addr).about("IP address to serve on"))
+        .arg(Arg::new("port").short('p').long("port").default_value("8000").takes_value(true).validator(check_is_port_num).about("Port to serve on"))
+        .arg(Arg::new("auth").long("auth").takes_value(true).validator(check_is_auth).about("HTTP Auth (username:password)"))
+        .arg(Arg::new("cert").long("cert").takes_value(true).validator(check_does_file_exits).about("Path of TLS/SSL public key (certificate)"))
+        .arg(Arg::new("key").long("key").takes_value(true).validator(check_does_file_exits).about("Path of TLS/SSL private key"))
+        .subcommand(clap::App::new("doc")
+            .about("Open cargo doc via local server (Need cargo installation)")
+            .arg(Arg::new("nocolor").long("nocolor").about("Disable cli colors"))
+            .arg(Arg::new("noopen").long("noopen").about("Do not open the page in the default browser"))
+            .arg(Arg::new("log").long("log").about("Enable access log output [default: disabled]"))
+            .arg(Arg::new("quietall").long("quietall").about("Disable all output"))
+            .arg(Arg::new("address").short('a').long("address").default_value("0.0.0.0").takes_value(true).validator(check_is_ip_addr).about("IP address to serve on"))
+            .arg(Arg::new("port").short('p').long("port").default_value("8000").takes_value(true).validator(check_is_port_num).about("Port to serve on"))
         )
-    )
-    .get_matches();
+        .get_matches();
 
     set_var(
         "ROOT",
@@ -608,11 +581,11 @@ async fn main() -> std::io::Result<()> {
         .format(|buf, record| {
             let data = record.args().to_string();
             let mut style = buf.style();
-            let blue = style.set_color(Color::Rgb(52, 152, 219));
+            let blue = style.set_color(Color::Cyan);
             let mut style = buf.style();
-            let red = style.set_color(Color::Rgb(231, 76, 60));
+            let red = style.set_color(Color::Red);
             let mut style = buf.style();
-            let green = style.set_color(Color::Rgb(76, 175, 80));
+            let green = style.set_color(Color::Green);
             if record.target() == "actix_web::middleware::logger" {
                 let data: Vec<&str> = data.splitn(5, '^').collect();
                 let time = blue.value(