diff --git a/Cargo.lock b/Cargo.lock
index 0d1b05ce..a831e218 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -601,7 +601,6 @@ name = "skim"
 version = "0.10.4"
 dependencies = [
  "beef",
- "bitflags 1.3.2",
  "chrono",
  "clap",
  "crossbeam",
diff --git a/Cargo.toml b/Cargo.toml
index 54560823..06cfa617 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -31,7 +31,6 @@ vte = "0.13.0"
 fuzzy-matcher = "0.3.7"
 rayon = "1.5.3"
 derive_builder = "0.20.2"
-bitflags = "1.3.2"
 timer = "0.2.0"
 chrono = "0.4.22"
 crossbeam = "0.8.2"
diff --git a/README.md b/README.md
index 5497d1a0..aabf2033 100644
--- a/README.md
+++ b/README.md
@@ -59,14 +59,16 @@ The skim project contains several components:
 
 ## Package Managers
 
-| Distribution   | Package Manager   | Command                      |
-| -------------- | ----------------- | ---------------------------- |
-| macOS          | Homebrew          | `brew install sk`            |
-| macOS          | MacPorts          | `sudo port install skim`     |
-| Fedora         | dnf               | `dnf install skim`           |
-| Alpine         | apk               | `apk add skim`               |
-| Arch           | pacman            | `pacman -S skim`             |
+| Distribution   | Package Manager   | Command                   |
+| -------------- | ----------------- | ------------------------- |
+| macOS          | Homebrew          | `brew install sk`         |
+| macOS          | MacPorts          | `sudo port install skim`  |
+| Fedora         | dnf               | `dnf install skim`        |
+| Alpine         | apk               | `apk add skim`            |
+| Arch           | pacman            | `pacman -S skim`          |
 | Gentoo         | Portage           | `emerge --ask app-misc/skim` |
+| Guix           | guix              | `guix install skim`       |
+| Void           | XBPS              | `xbps-install -S skim`      |
 
 See [repology](https://repology.org/project/skim/versions) for a comprehensive overview of package availability.
 
diff --git a/src/bin/main.rs b/src/bin/main.rs
index 21bdf96b..dcc1f4f7 100644
--- a/src/bin/main.rs
+++ b/src/bin/main.rs
@@ -168,22 +168,23 @@ fn real_main() -> Result<i32, std::io::Error> {
     let opts = App::new("sk")
         .author("Jinzhou Zhang<lotabout@gmail.com>")
         .version(crate_version!())
+        .args_override_self(true)
         .arg(Arg::with_name("help").long("help").short('h'))
         .arg(Arg::with_name("bind").long("bind").short('b').multiple(true).takes_value(true))
-        .arg(Arg::with_name("multi").long("multi").short('m').multiple(true))
-        .arg(Arg::with_name("no-multi").long("no-multi").multiple(true))
+        .arg(Arg::with_name("multi").long("multi").short('m'))
+        .arg(Arg::with_name("no-multi").long("no-multi"))
         .arg(Arg::with_name("prompt").long("prompt").short('p').multiple(true).takes_value(true).default_value("> "))
         .arg(Arg::with_name("cmd-prompt").long("cmd-prompt").multiple(true).takes_value(true).default_value("c> "))
         .arg(Arg::with_name("expect").long("expect").multiple(true).takes_value(true))
-        .arg(Arg::with_name("tac").long("tac").multiple(true))
+        .arg(Arg::with_name("tac").long("tac"))
         .arg(Arg::with_name("tiebreak").long("tiebreak").short('t').multiple(true).takes_value(true))
-        .arg(Arg::with_name("ansi").long("ansi").multiple(true))
-        .arg(Arg::with_name("exact").long("exact").short('e').multiple(true))
+        .arg(Arg::with_name("ansi").long("ansi"))
+        .arg(Arg::with_name("exact").long("exact").short('e'))
         .arg(Arg::with_name("cmd").long("cmd").short('c').multiple(true).takes_value(true))
-        .arg(Arg::with_name("interactive").long("interactive").short('i').multiple(true))
+        .arg(Arg::with_name("interactive").long("interactive").short('i'))
         .arg(Arg::with_name("query").long("query").short('q').multiple(true).takes_value(true))
         .arg(Arg::with_name("cmd-query").long("cmd-query").multiple(true).takes_value(true))
-        .arg(Arg::with_name("regex").long("regex").multiple(true))
+        .arg(Arg::with_name("regex").long("regex"))
         .arg(Arg::with_name("delimiter").long("delimiter").short('d').multiple(true).takes_value(true))
         .arg(Arg::with_name("nth").long("nth").short('n').multiple(true).takes_value(true))
         .arg(Arg::with_name("with-nth").long("with-nth").multiple(true).takes_value(true))
@@ -192,52 +193,52 @@ fn real_main() -> Result<i32, std::io::Error> {
         .arg(Arg::with_name("margin").long("margin").multiple(true).takes_value(true).default_value("0,0,0,0"))
         .arg(Arg::with_name("min-height").long("min-height").multiple(true).takes_value(true).default_value("10"))
         .arg(Arg::with_name("height").long("height").multiple(true).takes_value(true).default_value("100%"))
-        .arg(Arg::with_name("no-height").long("no-height").multiple(true))
-        .arg(Arg::with_name("no-clear").long("no-clear").multiple(true))
-        .arg(Arg::with_name("no-clear-start").long("no-clear-start").multiple(true))
-        .arg(Arg::with_name("no-mouse").long("no-mouse").multiple(true))
+        .arg(Arg::with_name("no-height").long("no-height"))
+        .arg(Arg::with_name("no-clear").long("no-clear"))
+        .arg(Arg::with_name("no-clear-start").long("no-clear-start"))
+        .arg(Arg::with_name("no-mouse").long("no-mouse"))
         .arg(Arg::with_name("preview").long("preview").multiple(true).takes_value(true))
         .arg(Arg::with_name("preview-window").long("preview-window").multiple(true).takes_value(true).default_value("right:50%"))
-        .arg(Arg::with_name("reverse").long("reverse").multiple(true))
+        .arg(Arg::with_name("reverse").long("reverse"))
 
         .arg(Arg::with_name("algorithm").long("algo").multiple(true).takes_value(true).default_value("skim_v2"))
         .arg(Arg::with_name("case").long("case").multiple(true).takes_value(true).default_value("smart"))
-        .arg(Arg::with_name("literal").long("literal").multiple(true))
-        .arg(Arg::with_name("cycle").long("cycle").multiple(true))
-        .arg(Arg::with_name("no-hscroll").long("no-hscroll").multiple(true))
+        .arg(Arg::with_name("literal").long("literal"))
+        .arg(Arg::with_name("cycle").long("cycle"))
+        .arg(Arg::with_name("no-hscroll").long("no-hscroll"))
         .arg(Arg::with_name("hscroll-off").long("hscroll-off").multiple(true).takes_value(true).default_value("10"))
-        .arg(Arg::with_name("filepath-word").long("filepath-word").multiple(true))
+        .arg(Arg::with_name("filepath-word").long("filepath-word"))
         .arg(Arg::with_name("jump-labels").long("jump-labels").multiple(true).takes_value(true).default_value("abcdefghijklmnopqrstuvwxyz"))
-        .arg(Arg::with_name("border").long("border").multiple(true))
-        .arg(Arg::with_name("inline-info").long("inline-info").multiple(true))
+        .arg(Arg::with_name("border").long("border"))
+        .arg(Arg::with_name("inline-info").long("inline-info"))
         .arg(Arg::with_name("header").long("header").multiple(true).takes_value(true).default_value(""))
         .arg(Arg::with_name("header-lines").long("header-lines").multiple(true).takes_value(true).default_value("0"))
         .arg(Arg::with_name("tabstop").long("tabstop").multiple(true).takes_value(true).default_value("8"))
-        .arg(Arg::with_name("no-bold").long("no-bold").multiple(true))
+        .arg(Arg::with_name("no-bold").long("no-bold"))
         .arg(Arg::with_name("history").long("history").multiple(true).takes_value(true))
         .arg(Arg::with_name("cmd-history").long("cmd-history").multiple(true).takes_value(true))
         .arg(Arg::with_name("history-size").long("history-size").multiple(true).takes_value(true).default_value("1000"))
         .arg(Arg::with_name("cmd-history-size").long("cmd-history-size").multiple(true).takes_value(true).default_value("1000"))
-        .arg(Arg::with_name("print-query").long("print-query").multiple(true))
-        .arg(Arg::with_name("print-cmd").long("print-cmd").multiple(true))
-        .arg(Arg::with_name("print-score").long("print-score").multiple(true))
-        .arg(Arg::with_name("read0").long("read0").multiple(true))
-        .arg(Arg::with_name("print0").long("print0").multiple(true))
-        .arg(Arg::with_name("sync").long("sync").multiple(true))
-        .arg(Arg::with_name("extended").long("extended").short('x').multiple(true))
-        .arg(Arg::with_name("no-sort").long("no-sort").multiple(true))
-        .arg(Arg::with_name("select-1").long("select-1").short('1').multiple(true))
-        .arg(Arg::with_name("exit-0").long("exit-0").short('0').multiple(true))
+        .arg(Arg::with_name("print-query").long("print-query"))
+        .arg(Arg::with_name("print-cmd").long("print-cmd"))
+        .arg(Arg::with_name("print-score").long("print-score"))
+        .arg(Arg::with_name("read0").long("read0"))
+        .arg(Arg::with_name("print0").long("print0"))
+        .arg(Arg::with_name("sync").long("sync"))
+        .arg(Arg::with_name("extended").long("extended").short('x'))
+        .arg(Arg::with_name("no-sort").long("no-sort"))
+        .arg(Arg::with_name("select-1").long("select-1").short('1'))
+        .arg(Arg::with_name("exit-0").long("exit-0").short('0'))
         .arg(Arg::with_name("filter").long("filter").short('f').takes_value(true).multiple(true))
         .arg(Arg::with_name("layout").long("layout").multiple(true).takes_value(true).default_value("default"))
-        .arg(Arg::with_name("keep-right").long("keep-right").multiple(true))
+        .arg(Arg::with_name("keep-right").long("keep-right"))
         .arg(Arg::with_name("skip-to-pattern").long("skip-to-pattern").multiple(true).takes_value(true).default_value(""))
         .arg(Arg::with_name("pre-select-n").long("pre-select-n").multiple(true).takes_value(true).default_value("0"))
         .arg(Arg::with_name("pre-select-pat").long("pre-select-pat").multiple(true).takes_value(true).default_value(""))
         .arg(Arg::with_name("pre-select-items").long("pre-select-items").multiple(true).takes_value(true))
         .arg(Arg::with_name("pre-select-file").long("pre-select-file").multiple(true).takes_value(true).default_value(""))
-        .arg(Arg::with_name("no-clear-if-empty").long("no-clear-if-empty").multiple(true))
-        .arg(Arg::with_name("show-cmd-error").long("show-cmd-error").multiple(true))
+        .arg(Arg::with_name("no-clear-if-empty").long("no-clear-if-empty"))
+        .arg(Arg::with_name("show-cmd-error").long("show-cmd-error"))
         .get_matches_from(args);
 
     if opts.is_present("help") {
diff --git a/src/engine/fuzzy.rs b/src/engine/fuzzy.rs
index 0c13ebc0..67117a56 100644
--- a/src/engine/fuzzy.rs
+++ b/src/engine/fuzzy.rs
@@ -1,3 +1,4 @@
+use std::cmp::min;
 use std::fmt::{Display, Error, Formatter};
 use std::sync::Arc;
 
@@ -8,7 +9,6 @@ use fuzzy_matcher::FuzzyMatcher;
 use crate::item::RankBuilder;
 use crate::{CaseMatching, MatchEngine};
 use crate::{MatchRange, MatchResult, SkimItem};
-use bitflags::_core::cmp::min;
 
 //------------------------------------------------------------------------------
 #[derive(Debug, Copy, Clone, Default)]
diff --git a/src/event.rs b/src/event.rs
index 45821bb8..c4825a1a 100644
--- a/src/event.rs
+++ b/src/event.rs
@@ -1,6 +1,5 @@
 // All the events that will be used
 
-use bitflags::bitflags;
 use std::sync::mpsc::{Receiver, Sender};
 use tuikit::key::Key;
 
@@ -77,12 +76,10 @@ pub enum Event {
     __Nonexhaustive,
 }
 
-bitflags! {
-    /// `Effect` is the effect of a text
-    pub struct UpdateScreen: u8 {
-        const REDRAW = 0b0000_0001;
-        const DONT_REDRAW = 0b0000_0010;
-    }
+/// `Effect` is the effect of a text
+pub enum UpdateScreen {
+    Redraw,
+    DontRedraw,
 }
 
 pub trait EventHandler {
diff --git a/src/header.rs b/src/header.rs
index f22c3eb8..3394f78a 100644
--- a/src/header.rs
+++ b/src/header.rs
@@ -143,6 +143,6 @@ impl Widget<Event> for Header {
 
 impl EventHandler for Header {
     fn handle(&mut self, _event: &Event) -> UpdateScreen {
-        UpdateScreen::DONT_REDRAW
+        UpdateScreen::DontRedraw
     }
 }
diff --git a/src/previewer.rs b/src/previewer.rs
index 304cba40..1a08fe13 100644
--- a/src/previewer.rs
+++ b/src/previewer.rs
@@ -333,9 +333,9 @@ impl EventHandler for Previewer {
             EvActPreviewRight(diff) => self.act_scroll_right(*diff),
             EvActPreviewPageUp(diff) => self.act_scroll_down(-(height as i32 * *diff)),
             EvActPreviewPageDown(diff) => self.act_scroll_down(height as i32 * *diff),
-            _ => return UpdateScreen::DONT_REDRAW,
+            _ => return UpdateScreen::DontRedraw,
         }
-        UpdateScreen::REDRAW
+        UpdateScreen::Redraw
     }
 }
 
diff --git a/src/query.rs b/src/query.rs
index fd0a1bb0..6ee1fb8b 100644
--- a/src/query.rs
+++ b/src/query.rs
@@ -534,9 +534,9 @@ impl EventHandler for Query {
         }
 
         if self.query_changed(mode, query_before_len, query_after_len, cmd_before_len, cmd_after_len) {
-            UpdateScreen::REDRAW
+            UpdateScreen::Redraw
         } else {
-            UpdateScreen::DONT_REDRAW
+            UpdateScreen::DontRedraw
         }
     }
 }
diff --git a/src/selection.rs b/src/selection.rs
index 95d56909..a696547f 100644
--- a/src/selection.rs
+++ b/src/selection.rs
@@ -395,9 +395,9 @@ impl EventHandler for Selection {
             EvActScrollRight(diff) => {
                 self.act_scroll(*diff);
             }
-            _ => return UpdateScreen::DONT_REDRAW,
+            _ => return UpdateScreen::DontRedraw,
         }
-        UpdateScreen::REDRAW
+        UpdateScreen::Redraw
     }
 }
 
diff --git a/src/util.rs b/src/util.rs
index a0aabf13..17f95380 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -1,6 +1,7 @@
 use std::borrow::Cow;
 use std::cmp::{max, min};
 use std::prelude::v1::*;
+use std::str::FromStr;
 
 use regex::{Captures, Regex};
 use tuikit::prelude::*;
@@ -8,7 +9,6 @@ use unicode_width::UnicodeWidthChar;
 
 use crate::field::get_string_by_range;
 use crate::AnsiString;
-use bitflags::_core::str::FromStr;
 
 lazy_static! {
     static ref RE_ESCAPE: Regex = Regex::new(r"['\U{00}]").unwrap();