diff --git a/Cargo.lock b/Cargo.lock
index a9cba31..9500bc2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,23 +1,45 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
-name = "ansi_term"
-version = "0.11.0"
+name = "anstream"
+version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
+checksum = "342258dd14006105c2b75ab1bd7543a03bdf0cfc94383303ac212a04939dff6f"
 dependencies = [
- "winapi",
+ "anstyle",
+ "anstyle-parse",
+ "anstyle-wincon",
+ "concolor-override",
+ "concolor-query",
+ "is-terminal",
+ "utf8parse",
 ]
 
 [[package]]
-name = "atty"
-version = "0.2.14"
+name = "anstyle"
+version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
+checksum = "23ea9e81bd02e310c216d080f6223c179012256e5151c41db88d12c88a1684d2"
+
+[[package]]
+name = "anstyle-parse"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a7d1bb534e9efed14f3e5f44e7dd1a4f709384023a4165199a4241e18dff0116"
 dependencies = [
- "hermit-abi",
- "libc",
- "winapi",
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle-wincon"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3127af6145b149f3287bb9a0d10ad9c5692dba8c53ad48285e5bec4063834fa"
+dependencies = [
+ "anstyle",
+ "windows-sys 0.45.0",
 ]
 
 [[package]]
@@ -32,19 +54,53 @@ version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
 
+[[package]]
+name = "cc"
+version = "1.0.79"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50d30906286121d95be3d479533b458f87493b30a4b5f79a607db8f5d11aa91f"
+
 [[package]]
 name = "clap"
-version = "2.33.1"
+version = "4.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bdfa80d47f954d53a35a64987ca1422f495b8d6483c0fe9f7117b36c2a792129"
+checksum = "046ae530c528f252094e4a77886ee1374437744b2bff1497aa898bbddbbb29b3"
 dependencies = [
- "ansi_term",
- "atty",
+ "clap_builder",
+]
+
+[[package]]
+name = "clap_builder"
+version = "4.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "223163f58c9a40c3b0a43e1c4b50a9ce09f007ea2cb1ec258a687945b4b7929f"
+dependencies = [
+ "anstream",
+ "anstyle",
  "bitflags",
+ "clap_lex",
  "strsim",
- "textwrap",
- "unicode-width",
- "vec_map",
+]
+
+[[package]]
+name = "clap_lex"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a2dd5a6fe8c6e3502f568a6353e5273bbb15193ad9a89e457b9970798efbea1"
+
+[[package]]
+name = "concolor-override"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a855d4a1978dc52fb0536a04d384c2c0c1aa273597f08b77c8c4d3b2eec6037f"
+
+[[package]]
+name = "concolor-query"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "88d11d52c3d7ca2e6d0040212be9e4dbbcd78b6447f535b6b561f449427944cf"
+dependencies = [
+ "windows-sys 0.45.0",
 ]
 
 [[package]]
@@ -53,6 +109,27 @@ version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6419a5c75e40011b9fe0174db3fe24006ab122fbe1b7e9cc5974b338a755c76"
 
+[[package]]
+name = "errno"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50d6a0976c999d473fe89ad888d5a284e55366d9dc9038b1ba2aa15128c4afa0"
+dependencies = [
+ "errno-dragonfly",
+ "libc",
+ "windows-sys 0.45.0",
+]
+
+[[package]]
+name = "errno-dragonfly"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa68f1b12764fab894d2755d2518754e71b4fd80ecfb822714a1206c2aab39bf"
+dependencies = [
+ "cc",
+ "libc",
+]
+
 [[package]]
 name = "fallible-iterator"
 version = "0.2.0"
@@ -83,7 +160,6 @@ dependencies = [
  "fdt-rs",
  "memmap",
  "tempdir",
- "unsafe_unwrap",
 ]
 
 [[package]]
@@ -94,18 +170,44 @@ checksum = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"
 
 [[package]]
 name = "hermit-abi"
-version = "0.1.15"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fed44880c466736ef9a5c5b5facefb5ed0785676d0c02d612db14e54f0d84286"
+
+[[package]]
+name = "io-lifetimes"
+version = "1.0.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3deed196b6e7f9e44a2ae8d94225d80302d81208b1bb673fd21fe634645c85a9"
+checksum = "9c66c74d2ae7e79a5a8f7ac924adbe38ee42a859c6539ad869eb51f0b52dc220"
 dependencies = [
+ "hermit-abi",
  "libc",
+ "windows-sys 0.48.0",
+]
+
+[[package]]
+name = "is-terminal"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "256017f749ab3117e93acb91063009e1f1bb56d03965b14c2c8df4eb02c524d8"
+dependencies = [
+ "hermit-abi",
+ "io-lifetimes",
+ "rustix",
+ "windows-sys 0.45.0",
 ]
 
 [[package]]
 name = "libc"
-version = "0.2.73"
+version = "0.2.141"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3304a64d199bb964be99741b7a14d26972741915b3649639149b2479bb46f4b5"
+
+[[package]]
+name = "linux-raw-sys"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bd7d4bd64732af4bf3a67f367c27df8520ad7e230c5817b8ff485864d80242b9"
+checksum = "d59d8c75012853d2e872fb56bc8a2e53718e2cafe1a4c823143141c6d90c322f"
 
 [[package]]
 name = "memmap"
@@ -219,6 +321,20 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "rustix"
+version = "0.37.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2aae838e49b3d63e9274e1c01833cc8139d3fec468c3b84688c628f44b1ae11d"
+dependencies = [
+ "bitflags",
+ "errno",
+ "io-lifetimes",
+ "libc",
+ "linux-raw-sys",
+ "windows-sys 0.45.0",
+]
+
 [[package]]
 name = "semver"
 version = "0.9.0"
@@ -242,9 +358,9 @@ checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 
 [[package]]
 name = "strsim"
-version = "0.8.0"
+version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
+checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
 
 [[package]]
 name = "syn"
@@ -267,21 +383,6 @@ dependencies = [
  "remove_dir_all",
 ]
 
-[[package]]
-name = "textwrap"
-version = "0.11.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
-dependencies = [
- "unicode-width",
-]
-
-[[package]]
-name = "unicode-width"
-version = "0.1.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9337591893a19b88d8d87f2cec1e73fad5cdfd10e5a6f349f498ad6ea2ffb1e3"
-
 [[package]]
 name = "unicode-xid"
 version = "0.2.1"
@@ -295,10 +396,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1230ec65f13e0f9b28d789da20d2d419511893ea9dac2c1f4ef67b8b14e5da80"
 
 [[package]]
-name = "vec_map"
-version = "0.8.2"
+name = "utf8parse"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
+checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"
 
 [[package]]
 name = "winapi"
@@ -321,3 +422,135 @@ name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "windows-sys"
+version = "0.45.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "75283be5efb2831d37ea142365f009c02ec203cd29a3ebecbc093d52315b66d0"
+dependencies = [
+ "windows-targets 0.42.2",
+]
+
+[[package]]
+name = "windows-sys"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
+dependencies = [
+ "windows-targets 0.48.0",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.42.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e5180c00cd44c9b1c88adb3693291f1cd93605ded80c250a75d472756b4d071"
+dependencies = [
+ "windows_aarch64_gnullvm 0.42.2",
+ "windows_aarch64_msvc 0.42.2",
+ "windows_i686_gnu 0.42.2",
+ "windows_i686_msvc 0.42.2",
+ "windows_x86_64_gnu 0.42.2",
+ "windows_x86_64_gnullvm 0.42.2",
+ "windows_x86_64_msvc 0.42.2",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b1eb6f0cd7c80c79759c929114ef071b87354ce476d9d94271031c0497adfd5"
+dependencies = [
+ "windows_aarch64_gnullvm 0.48.0",
+ "windows_aarch64_msvc 0.48.0",
+ "windows_i686_gnu 0.48.0",
+ "windows_i686_msvc 0.48.0",
+ "windows_x86_64_gnu 0.48.0",
+ "windows_x86_64_gnullvm 0.48.0",
+ "windows_x86_64_msvc 0.48.0",
+]
+
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.42.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "597a5118570b68bc08d8d59125332c54f1ba9d9adeedeef5b99b02ba2b0698f8"
+
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "91ae572e1b79dba883e0d315474df7305d12f569b400fcf90581b06062f7e1bc"
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.42.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e08e8864a60f06ef0d0ff4ba04124db8b0fb3be5776a5cd47641e942e58c4d43"
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2ef27e0d7bdfcfc7b868b317c1d32c641a6fe4629c171b8928c7b08d98d7cf3"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.42.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c61d927d8da41da96a81f029489353e68739737d3beca43145c8afec9a31a84f"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "622a1962a7db830d6fd0a69683c80a18fda201879f0f447f065a3b7467daa241"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.42.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "44d840b6ec649f480a41c8d80f9c65108b92d89345dd94027bfe06ac444d1060"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4542c6e364ce21bf45d69fdd2a8e455fa38d316158cfd43b3ac1c5b1b19f8e00"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.42.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8de912b8b8feb55c064867cf047dda097f92d51efad5b491dfb98f6bbb70cb36"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca2b8a661f7628cbd23440e50b05d705db3686f894fc9580820623656af974b1"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.42.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "26d41b46a36d453748aedef1486d5c7a85db22e56aff34643984ea85514e94a3"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7896dbc1f41e08872e9d5e8f8baa8fdd2677f29468c4e156210174edc7f7b953"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.42.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9aec5da331524158c6d1a4ac0ab1541149c0b9505fde06423b02f5ef0106b9f0"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a515f5799fe4961cb532f983ce2b23082366b898e52ffbce459c86f67c8378a"
diff --git a/Cargo.toml b/Cargo.toml
index 93cc098..fa1377f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,9 +13,8 @@ keywords = ["Device", "Tree", "DTB",  "FDT"]
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-clap = "2.33"
+clap = "4.1"
 memmap = "0.7"
-unsafe_unwrap = "0.1.0"
 
 [dependencies.fdt-rs]
 version = "0.4"
diff --git a/src/main.rs b/src/main.rs
index 9f34a22..8f7e457 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,11 +1,6 @@
 extern crate clap;
 extern crate fdt_rs;
 extern crate memmap;
-extern crate unsafe_unwrap;
-
-use unsafe_unwrap::UnsafeUnwrap;
-
-use clap::{App, Arg};
 
 use memmap::MmapOptions;
 
@@ -43,7 +38,7 @@ fn are_printable_strings(mut prop_iter: StringPropIter) -> bool {
     }
 }
 
-impl<'i, 'dt> FdtDumper {
+impl FdtDumper {
     fn push_indent(&mut self) {
         for _ in 0..self.indent {
             self.dump.push_str("    ");
@@ -84,7 +79,7 @@ impl<'i, 'dt> FdtDumper {
             if are_printable_strings(prop.iter_str()) {
                 let mut iter = prop.iter_str();
                 while let Some(s) = iter.next()? {
-                    self.dump.push_str("\"");
+                    self.dump.push('\"');
                     self.dump.push_str(s);
                     self.dump.push_str("\", ");
                 }
@@ -119,10 +114,10 @@ impl<'i, 'dt> FdtDumper {
         self.dump_node(node)?;
         self.indent += 1;
         for prop in node.props() {
-            let _ = self.dump_property(prop)?;
+            self.dump_property(prop)?;
         }
         for child in node.children() {
-            let _ = self.dump_level(&child)?;
+            self.dump_level(&child)?;
         }
         self.indent -= 1;
         self.push_indent();
@@ -178,28 +173,27 @@ struct FdtDumper {
 }
 
 fn main() {
-    let args = App::new("fdtdump")
+    let args = clap::Command::new("fdtdump")
         .version("0.1.0")
         .about("A simple dtb decompiler")
         .arg(
-            Arg::with_name("dtb-file")
+            clap::Arg::new("dtb-file")
                 .required(true)
                 .help("Path to dtb file"),
         )
         .get_matches();
 
-    // Required - unwrap ok
-    unsafe {
-        let fname = args.value_of("dtb-file").unsafe_unwrap();
+    let fname = args.get_one::<String>("dtb-file").unwrap();
 
-        let file = File::open(fname).unwrap_or_else(|_| panic!("Unable to open {}", fname));
+    let file = File::open(fname).unwrap_or_else(|_| panic!("Unable to open {}", fname));
 
-        let mmap = MmapOptions::new()
+    let mmap = unsafe {
+        MmapOptions::new()
             .map(&file)
-            .unwrap_or_else(|_| panic!("Unable to map in {}", fname));
+            .unwrap_or_else(|_| panic!("Unable to map in {}", fname))
+    };
 
-        let slice = slice::from_raw_parts(mmap.as_ptr(), mmap.len());
+    let slice = unsafe { slice::from_raw_parts(mmap.as_ptr(), mmap.len()) };
 
-        FdtDumper::dump_tree(slice).unwrap();
-    }
+    FdtDumper::dump_tree(slice).unwrap();
 }