diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 955a7de..0248606 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -105,7 +105,7 @@ build-base-stable:
 
 build-base-msrv:
   extends: build-base-stable
-  image: "rust:1.48.0"
+  image: "rust:1.54.0"
   cache:
     key: msrv
     paths:
@@ -131,7 +131,7 @@ build-stable:
 build-msrv:
   extends: build-stable
   needs: ["build-base-msrv"]
-  image: "rust:1.48.0"
+  image: "rust:1.54.0"
   cache:
     key: msrv
     paths:
@@ -156,7 +156,7 @@ test-stable:
 
 test-msrv:
   extends: test-stable
-  image: "rust:1.48.0"
+  image: "rust:1.54.0"
   needs: ["build-msrv"]
   cache:
     key: msrv
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9cf868e..ae54e49 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,8 +4,9 @@ Dates are given in YYYY-MM-DD format - for example, the 15th of October 2021 is
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to
 [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## Unreleased
+## v0.5.0 - 2022-01-01
 ### Changed
+- The Minimum Supported Rust Version (MSRV) is now **1.54.0**.
 - Updated [`new_mime_guess`] to 4.0.0
 - `--version` output now handles missing Git commit hashes, and specifies the target operating system
 ### Fixed
diff --git a/Cargo.lock b/Cargo.lock
index c24cf83..5ec4f9d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,15 +2,6 @@
 # It is not intended for manual editing.
 version = 3
 
-[[package]]
-name = "aho-corasick"
-version = "0.7.18"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e37cfd5e7657ada45f742d6e99ca5788580b5c529dc78faf11ece6dc702656f"
-dependencies = [
- "memchr",
-]
-
 [[package]]
 name = "arrayvec"
 version = "0.5.2"
@@ -89,9 +80,9 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "clap"
-version = "3.0.0-beta.2"
+version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4bd1061998a501ee7d4b6d449020df3266ca3124b941ec56cf2005c3779ca142"
+checksum = "d17bf219fcd37199b9a29e00ba65dfb8cd5b2688b7297ec14ff829c40ac50ca9"
 dependencies = [
  "atty",
  "bitflags",
@@ -102,15 +93,14 @@ dependencies = [
  "termcolor",
  "terminal_size",
  "textwrap",
- "unicode-width",
- "vec_map",
+ "unicase",
 ]
 
 [[package]]
 name = "clap_derive"
-version = "3.0.0-beta.2"
+version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "370f715b81112975b1b69db93e0b56ea4cd4e5002ac43b2da8474106a54096a1"
+checksum = "e1b9752c030a14235a0bd5ef3ad60a1dcac8468c30921327fc8af36b20c790b9"
 dependencies = [
  "heck",
  "proc-macro-error",
@@ -221,12 +211,11 @@ checksum = "de853764b47027c2e862a995c34978ffa63c1501f2e15f987ba11bd4f9bba193"
 
 [[package]]
 name = "fif"
-version = "0.4.0"
+version = "0.5.0"
 dependencies = [
  "assert_cmd",
  "cfg-if",
  "clap",
- "clap_derive",
  "env_logger",
  "exitcode",
  "infer",
@@ -445,9 +434,12 @@ checksum = "da32515d9f6e6e489d7bc9d84c71b060db7247dc035bbe44eac88cf87486d8d5"
 
 [[package]]
 name = "os_str_bytes"
-version = "2.4.0"
+version = "6.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "afb2e1c3ee07430c2cf76151675e583e0f19985fa6efae47d6848a3e2c824f85"
+checksum = "8e22443d1643a904602595ba1cd8f7d896afe56d26712531c5ff73a15b2fbf64"
+dependencies = [
+ "memchr",
+]
 
 [[package]]
 name = "parking_lot"
@@ -678,8 +670,6 @@ version = "1.5.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d07a8629359eb56f1e2fb1652bb04212c072a87ba68546a04065d525673ac461"
 dependencies = [
- "aho-corasick",
- "memchr",
  "regex-syntax",
 ]
 
@@ -845,9 +835,9 @@ checksum = "13a4ec180a2de59b57434704ccfad967f789b12737738798fa08798cd5824c16"
 
 [[package]]
 name = "textwrap"
-version = "0.12.1"
+version = "0.14.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "203008d98caf094106cfaba70acfed15e18ed3ddb7d94e49baec153a2b462789"
+checksum = "0066c8d12af8b5acd21e00547c3797fde4e8677254a7ee429176ccebbe93dd80"
 dependencies = [
  "terminal_size",
  "unicode-width",
@@ -912,12 +902,6 @@ version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bc5cf98d8186244414c848017f0e2676b3fcb46807f6668a97dfe67359a3c4b7"
 
-[[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 = "0.9.4"
diff --git a/Cargo.toml b/Cargo.toml
index a155ca1..86497f7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,11 +4,11 @@
 [package]
 name = "fif"
 description = "A command-line tool for detecting and optionally correcting files with incorrect extensions."
-version = "0.4.0"
+version = "0.5.0"
 authors = ["Lynnesbian <lynne@bune.city>"]
 edition = "2018"
 license = "GPL-3.0-or-later"
-rust-version = "1.48.0" # this can actually go as low as 1.41.0 after removing cached, but i'll leave it 1.43.0
+rust-version = "1.54.0" # clap 3 requires >=1.54.0
 repository = "https://gitlab.com/Lynnesbian/fif"
 readme = "README.md"
 keywords = ["mime", "mimetype", "utilities", "tools"]
@@ -62,13 +62,9 @@ smartstring = ">= 0.2.4"
 
 [dependencies.clap]
 # beta.4 requires rust >= 1.54.0 (and beta.3 was yanked)
-version = "=3.0.0-beta.2"
+version = "3.0.0"
 default-features = false
-features = ["wrap_help", "color", "derive", "std"]
-
-[dependencies.clap_derive]
-# without this, clap beta.2 will install clap_derive beta.4 :c
-version = "=3.0.0-beta.2"
+features = ["wrap_help", "color", "derive", "std", "unicode"]
 
 [dependencies.env_logger]
 version = "0.9.0"
@@ -79,7 +75,7 @@ features = ["termcolor", "atty"]
 tempfile = "3.2.0"
 rand = "0.8.3"
 assert_cmd = "2.0.2"
-regex = "1.5.4"
+regex = { version = "1.5.4", default-features = false, features = ["std"] }
 
 [profile.release]
 lto = "thin"
@@ -92,4 +88,4 @@ opt-level = 3
 opt-level = 3
 
 [package.metadata]
-msrv = "1.48.0"
+msrv = "1.54.0"
diff --git a/README.md b/README.md
index f53c918..2742440 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@
 
 [![Version](https://img.shields.io/crates/v/fif.svg?logo=rust&style=flat-square)
 ](https://crates.io/crates/fif)
-[![Minimum Supported Rust Version](https://img.shields.io/badge/msrv-1.48.0-orange?logo=rust&style=flat-square)
+[![Minimum Supported Rust Version](https://img.shields.io/badge/msrv-1.54.0-orange?logo=rust&style=flat-square)
 ](https://gitlab.com/Lynnesbian/fif/-/blob/master/README.md#version-policy)
 [![License](https://img.shields.io/crates/l/fif.svg?style=flat-square)
 ](https://gitlab.com/Lynnesbian/fif/-/blob/master/LICENSE)
diff --git a/clippy.toml b/clippy.toml
index 0ea17ce..5657ebd 100644
--- a/clippy.toml
+++ b/clippy.toml
@@ -3,4 +3,4 @@
 
 # avoid-breaking-exported-api = false # only available on nightly for now
 cognitive-complexity-threshold = 15
-msrv = "1.48.0"
+msrv = "1.54.0"
diff --git a/src/main.rs b/src/main.rs
index f776e72..6399152 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -16,7 +16,7 @@ use std::io::{stdin, stdout, BufWriter, Write};
 use std::process::exit;
 
 use cfg_if::cfg_if;
-use clap::Clap;
+use clap::Parser;
 use fif::files::{scan_directory, scan_from_walkdir};
 use fif::formats::{self, Format};
 use fif::parameters::{self, OutputFormat, Prompt};
diff --git a/src/parameters.rs b/src/parameters.rs
index 2629366..40626d3 100644
--- a/src/parameters.rs
+++ b/src/parameters.rs
@@ -7,7 +7,7 @@ use std::collections::BTreeSet;
 use std::path::PathBuf;
 
 use cfg_if::cfg_if;
-use clap::{AppSettings, Clap};
+use clap::{Parser, ArgEnum};
 
 use crate::utils::{CLAP_LONG_VERSION, CLAP_VERSION};
 use crate::String as StringType;
@@ -22,7 +22,7 @@ cfg_if! {
 	}
 }
 
-#[derive(Clap, PartialEq, Debug, Copy, Clone)]
+#[derive(ArgEnum, PartialEq, Debug, Copy, Clone)]
 /// The format to use when running fif without the `--fix` flag. Specified at runtime with the `-o`/`--output-format`
 /// flag.
 pub enum OutputFormat {
@@ -39,7 +39,7 @@ pub enum OutputFormat {
 	Json,
 }
 
-#[derive(Clap, PartialEq, Debug, Copy, Clone)]
+#[derive(ArgEnum, PartialEq, Debug, Copy, Clone)]
 /// Specifies under what conditions the user should be prompted when running fif in `--fix` mode. Defaults to `Error`.
 /// Specified at runtime with the `-p`/`--prompt` flag.
 pub enum Prompt {
@@ -51,7 +51,7 @@ pub enum Prompt {
 	Always,
 }
 
-#[derive(Clap, Debug)]
+#[derive(Parser, Debug)]
 #[allow(clippy::struct_excessive_bools)]
 #[clap(
 	version = CLAP_VERSION.as_str(),
@@ -63,7 +63,6 @@ pub enum Prompt {
 	This program is free software: you can redistribute it and/or modify \
 	it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 \
 	of the License, or (at your option) any later version.",
-	setting(AppSettings::ColoredHelp),
 	max_term_width = 120
 )]
 /// [`Clap`]-derived struct used to parse command line arguments.
@@ -88,7 +87,7 @@ pub struct Parameters {
 	/// Only examine files with these extensions.
 	/// Multiple extensions can be specified by either using the flag multiple times (`-e jpg -e png -e gif`), or by
 	/// separating them with commas (`-e jpg,png,gif`).
-	#[clap(short, long, use_delimiter = true, require_delimiter = true, value_name = "ext", validator = lowercase_exts)]
+	#[clap(short, long, use_delimiter = true, require_delimiter = true, value_name = "ext", takes_value = true, validator = validate_exts)]
 	pub exts: Option<Vec<StringType>>,
 
 	/// Use these preset lists of extensions as the search filter (comma-separated list).
@@ -106,7 +105,8 @@ pub struct Parameters {
 
 	/// Don't scan files with these extensions.
 	/// This option takes precedence over extensions specified with `-e` or `-E`.
-	#[clap(short = 'x', long, use_delimiter = true, require_delimiter = true, value_name = "ext", validator = lowercase_exts)]
+	#[clap(short = 'x', long, use_delimiter = true, require_delimiter = true, value_name = "ext", validator =
+	validate_exts)]
 	pub exclude: Option<Vec<StringType>>,
 
 	/// Exclude files using a preset list of extensions.
@@ -177,9 +177,15 @@ pub struct Parameters {
 	pub jobs: usize,
 }
 
-/// Validation function for argument parsing that ensures passed-in extensions are lowercase.
-fn lowercase_exts(exts: &str) -> Result<(), String> {
+/// Validation function for argument parsing that ensures passed-in extensions are lowercase, and that the user
+/// didn't supply an empty list.
+fn validate_exts(exts: &str) -> Result<(), String> {
 	// TODO: i would much rather accept uppercase exts and convert them to lowercase than just rejecting lowercase exts...
+
+	if exts.is_empty() {
+		return Err(String::from("Cannot specify empty extensions"));
+	}
+
 	if exts.to_lowercase() != exts {
 		return Err(String::from("Supplied extensions must be lowercase"));
 	}
@@ -290,7 +296,7 @@ impl Parameters {
 }
 
 /// Sets of extensions for use with [Parameter](crate::parameters::Parameters)'s `-E` flag.
-#[derive(Clap, PartialEq, Debug, Copy, Clone)]
+#[derive(ArgEnum, PartialEq, Debug, Copy, Clone)]
 pub enum ExtensionSet {
 	/// Extensions used for image file formats, such as `png`, `jpeg`, `webp`, etc.
 	Images,
diff --git a/src/tests/mod.rs b/src/tests/mod.rs
index ac89220..82b2f24 100644
--- a/src/tests/mod.rs
+++ b/src/tests/mod.rs
@@ -6,7 +6,7 @@ use std::collections::{BTreeMap, HashMap};
 use std::ffi::OsStr;
 use std::path::{Path, PathBuf};
 
-use clap::Clap;
+use clap::Parser;
 use fif::files::{mime_extension_lookup, scan_directory, scan_from_walkdir, BUF_SIZE};
 use fif::findings::Findings;
 use fif::formats::{Format, PowerShell, Shell};
@@ -306,6 +306,8 @@ fn rejects_bad_args() {
 		vec!["fif", "-X", "pebis"],
 		// `-e` with nothing but commas:
 		vec!["fif", "-e", ",,,,,"],
+		// `-x` with nothing but commas:
+		vec!["fif", "-x", ",,,,,"],
 		// `-j` with a negative value:
 		vec!["fif", "-j", "-1"],
 		// `--prompt` without `--fix`:
@@ -357,7 +359,7 @@ fn check_version_output() {
 	let output = cmd.arg("-V").ok().unwrap().stdout;
 	let output = String::from_utf8(output).unwrap();
 	assert!(
-		Regex::new(r#"fif v(\d\.){2}\d"#).unwrap().is_match(output.trim()),
+		Regex::new(r#"fif v([0-9]\.){2}[0-9]"#).unwrap().is_match(output.trim()),
 		"\"{}\" does not match the expected `-v` format!",
 		output
 	);
@@ -368,7 +370,7 @@ fn check_version_output() {
 	let output = cmd.arg("--version").ok().unwrap().stdout;
 	let output = String::from_utf8(output).unwrap();
 	assert!(
-		Regex::new(r#"fif v(\d\.){2}\d \(.+, .+ backend, (unknown commit|commit #[\da-f]{7})\)"#)
+		Regex::new(r#"fif v([0-9]\.){2}[0-9] \(.+, .+ backend, (unknown commit|commit #[[:xdigit:]]{7})\)"#)
 			.unwrap()
 			.is_match(output.trim()),
 		"\"{}\" does not match the expected `--version` format!",