diff --git a/Cargo.lock b/Cargo.lock
index 7869728..dbcd041 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -119,9 +119,9 @@ dependencies = [
 
 [[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",
@@ -132,14 +132,14 @@ dependencies = [
  "strsim",
  "termcolor",
  "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",
@@ -659,9 +659,12 @@ checksum = "692fcb63b64b1758029e0a96ee63e049ce8c5948587f2f7208df04625e5f6b56"
 
 [[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 = "pkg-config"
@@ -1089,6 +1092,15 @@ dependencies = [
  "static_assertions",
 ]
 
+[[package]]
+name = "unicase"
+version = "2.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50f37be617794602aabbeee0be4f259dc1778fabe05e2d67ee8f79326d5cb4f6"
+dependencies = [
+ "version_check",
+]
+
 [[package]]
 name = "unicode-segmentation"
 version = "1.7.1"
@@ -1128,12 +1140,6 @@ version = "0.2.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "025ce40a007e1907e58d5bc1a594def78e5573bb0b1160bc389634e8f12e4faa"
 
-[[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 = "0.9.3"
diff --git a/datman/Cargo.toml b/datman/Cargo.toml
index 09f85c1..c8d49e9 100644
--- a/datman/Cargo.toml
+++ b/datman/Cargo.toml
@@ -11,7 +11,7 @@ description = "A chunked and deduplicated backup system using Yama"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-clap = "= 3.0.0-beta.4"
+clap = "= 3.0.0-beta.5"
 anyhow = "1.0"
 thiserror = "1.0"
 serde = { version = "1.0.104", features = ["derive"] }
diff --git a/datman/src/bin/datman.rs b/datman/src/bin/datman.rs
index 1628ab6..1fd41ce 100644
--- a/datman/src/bin/datman.rs
+++ b/datman/src/bin/datman.rs
@@ -17,7 +17,7 @@ along with Yama.  If not, see <https://www.gnu.org/licenses/>.
 
 use std::path::{Path, PathBuf};
 
-use clap::Clap;
+use clap::Parser;
 use env_logger::Env;
 
 use anyhow::bail;
@@ -37,7 +37,7 @@ pub const WHITE: &str = "\x1b[37m";
 pub const RED: &str = "\x1b[31m";
 pub const GREEN: &str = "\x1b[32m";
 
-#[derive(Clap)]
+#[derive(Parser)]
 pub enum DatmanCommand {
     /// Initialise a datman descriptor in this directory.
     Init {},
diff --git a/yama/Cargo.toml b/yama/Cargo.toml
index d5e8053..7a91244 100644
--- a/yama/Cargo.toml
+++ b/yama/Cargo.toml
@@ -14,7 +14,7 @@ license = "GPL-3.0-or-later"
 fastcdc = "1.0.2"
 zstd = "0.6.0"  # 0.6.0+zstd.1.4.8
 sshish = "0.1.0"
-clap = "= 3.0.0-beta.4"
+clap = "= 3.0.0-beta.5"
 blake = "2.0.0"
 twox-hash = "1.5.0"
 serde = { version = "1.0.104", features = ["derive"] }
diff --git a/yama/src/bin/yama.rs b/yama/src/bin/yama.rs
index 67780af..c6d5656 100644
--- a/yama/src/bin/yama.rs
+++ b/yama/src/bin/yama.rs
@@ -18,7 +18,7 @@ along with Yama.  If not, see <https://www.gnu.org/licenses/>.
 use std::path::{Path, PathBuf};
 
 use anyhow::{bail, Context};
-use clap::{crate_authors, crate_description, crate_version, Clap};
+use clap::{crate_authors, crate_description, crate_version, Parser};
 use log::info;
 
 use env_logger::Env;
@@ -31,7 +31,7 @@ use yama::operations::{checking, extracting};
 use yama::pile::{Pile, PileDescriptor, RawPile};
 use yama::{commands, debug};
 
-#[derive(Clap)]
+#[derive(Parser)]
 #[clap(version = crate_version!(), author = crate_authors!(), about = crate_description!())]
 struct Opts {
     /// Chooses a different pile to be the working pile.
@@ -43,7 +43,7 @@ struct Opts {
     command: PileCommand,
 }
 
-#[derive(Clap)]
+#[derive(Parser)]
 enum PileCommand {
     /// Initialise a yama pile in this directory.
     Init {},
diff --git a/yama/src/debug.rs b/yama/src/debug.rs
index 325a92e..a4f74d4 100644
--- a/yama/src/debug.rs
+++ b/yama/src/debug.rs
@@ -20,12 +20,12 @@ use crate::definitions::{FilesystemOwnership, FilesystemPermissions, TreeNode};
 use crate::pile::{Pile, PileDescriptor, RawPile};
 use crate::tree::integrate_node_in_place;
 use anyhow::anyhow;
-use clap::Clap;
+use clap::Parser;
 use log::info;
 use rustyline::error::ReadlineError;
 use rustyline::Editor;
 
-#[derive(Clap)]
+#[derive(Parser)]
 pub enum DebugCommand {
     /// List the pointers that are stored in this yama pile.
     #[clap(name = "lsp")]