diff --git a/Cargo.lock b/Cargo.lock
index a9b7b51..5e18d65 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -36,34 +36,19 @@ dependencies = [
  "sacabase",
 ]
 
-[[package]]
-name = "cfg-if"
-version = "0.1.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
-
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
-[[package]]
-name = "cloudabi"
-version = "0.0.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ddfc5b9aa5d4507acaf872de71051dfd0e309860e88966e1051e462a077aac4f"
-dependencies = [
- "bitflags",
-]
-
 [[package]]
 name = "crossbeam-channel"
 version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "06ed27e177f16d65f0f0c22a213e17c696ace5dd64b14258b52f9417ccb52db4"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "crossbeam-utils",
 ]
 
@@ -73,26 +58,10 @@ version = "0.8.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d82cfc11ce7f2c3faef78d8a684447b40d503d9681acebed6cb728d45940c4db"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "lazy_static",
 ]
 
-[[package]]
-name = "crossterm"
-version = "0.15.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "207a948d1b4ff59e5aec9bb9426cc4fd3d17b719e5c7b74e27f0a60c4cc2d095"
-dependencies = [
- "bitflags",
- "crossterm_winapi 0.6.2",
- "lazy_static",
- "libc",
- "mio 0.6.23",
- "parking_lot 0.10.2",
- "signal-hook 0.1.17",
- "winapi 0.3.9",
-]
-
 [[package]]
 name = "crossterm"
 version = "0.25.0"
@@ -100,22 +69,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e64e6c0fbe2c17357405f7c758c1ef960fce08bdfb2c03d88d2a18d7e09c4b67"
 dependencies = [
  "bitflags",
- "crossterm_winapi 0.9.0",
+ "crossterm_winapi",
  "libc",
- "mio 0.8.4",
- "parking_lot 0.12.1",
- "signal-hook 0.3.14",
+ "mio",
+ "parking_lot",
+ "signal-hook",
  "signal-hook-mio",
- "winapi 0.3.9",
-]
-
-[[package]]
-name = "crossterm_winapi"
-version = "0.6.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c2265c3f8e080075d9b6417aa72293fc71662f34b4af2612d8d1b074d29510db"
-dependencies = [
- "winapi 0.3.9",
+ "winapi",
 ]
 
 [[package]]
@@ -124,42 +84,7 @@ version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2ae1b35a484aa10e07fe0638d02301c5ad24de82d310ccbd2f3693da5f09bf1c"
 dependencies = [
- "winapi 0.3.9",
-]
-
-[[package]]
-name = "fuchsia-zircon"
-version = "0.3.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2e9763c69ebaae630ba35f74888db465e49e259ba1bc0eda7d06f4a067615d82"
-dependencies = [
- "bitflags",
- "fuchsia-zircon-sys",
-]
-
-[[package]]
-name = "fuchsia-zircon-sys"
-version = "0.3.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3dcaa9ae7725d12cdb85b3ad99a434db70b468c09ded17e012d86b5c1010f7a7"
-
-[[package]]
-name = "iovec"
-version = "0.1.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b2b3ea6ff95e175473f8ffe6a7eb7c00d054240321b84c57051175fe3c1e075e"
-dependencies = [
- "libc",
-]
-
-[[package]]
-name = "kernel32-sys"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
-dependencies = [
- "winapi 0.2.8",
- "winapi-build",
+ "winapi",
 ]
 
 [[package]]
@@ -180,15 +105,6 @@ version = "0.2.135"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "68783febc7782c6c5cb401fbda4de5a9898be1762314da0bb2c10ced61f18b0c"
 
-[[package]]
-name = "lock_api"
-version = "0.3.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c4da24a77a3d8a6d4862d95f72e6fdb9c09a643ecdb402d754004a557f2bec75"
-dependencies = [
- "scopeguard",
-]
-
 [[package]]
 name = "lock_api"
 version = "0.4.9"
@@ -205,26 +121,7 @@ version = "0.4.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
 dependencies = [
- "cfg-if 1.0.0",
-]
-
-[[package]]
-name = "mio"
-version = "0.6.23"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4afd66f5b91bf2a3bc13fad0e21caedac168ca4c707504e75585648ae80e4cc4"
-dependencies = [
- "cfg-if 0.1.10",
- "fuchsia-zircon",
- "fuchsia-zircon-sys",
- "iovec",
- "kernel32-sys",
- "libc",
- "log",
- "miow",
- "net2",
- "slab",
- "winapi 0.2.8",
+ "cfg-if",
 ]
 
 [[package]]
@@ -239,29 +136,6 @@ dependencies = [
  "windows-sys 0.36.1",
 ]
 
-[[package]]
-name = "miow"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ebd808424166322d4a38da87083bfddd3ac4c131334ed55856112eb06d46944d"
-dependencies = [
- "kernel32-sys",
- "net2",
- "winapi 0.2.8",
- "ws2_32-sys",
-]
-
-[[package]]
-name = "net2"
-version = "0.2.38"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "74d0df99cfcd2530b2e694f6e17e7f37b8e26bb23983ac530c0c97408837c631"
-dependencies = [
- "cfg-if 0.1.10",
- "libc",
- "winapi 0.3.9",
-]
-
 [[package]]
 name = "num-traits"
 version = "0.2.14"
@@ -271,38 +145,14 @@ dependencies = [
  "autocfg",
 ]
 
-[[package]]
-name = "parking_lot"
-version = "0.10.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d3a704eb390aafdc107b0e392f56a82b668e3a71366993b5340f5833fd62505e"
-dependencies = [
- "lock_api 0.3.4",
- "parking_lot_core 0.7.2",
-]
-
 [[package]]
 name = "parking_lot"
 version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3742b2c103b9f06bc9fff0a37ff4912935851bee6d36f3c02bcc755bcfec228f"
 dependencies = [
- "lock_api 0.4.9",
- "parking_lot_core 0.9.4",
-]
-
-[[package]]
-name = "parking_lot_core"
-version = "0.7.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d58c7c768d4ba344e3e8d72518ac13e259d7c7ade24167003b8488e10b6740a3"
-dependencies = [
- "cfg-if 0.1.10",
- "cloudabi",
- "libc",
- "redox_syscall 0.1.57",
- "smallvec",
- "winapi 0.3.9",
+ "lock_api",
+ "parking_lot_core",
 ]
 
 [[package]]
@@ -311,9 +161,9 @@ version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4dc9e0dc2adc1c69d09143aff38d3d30c5c3f0df0dad82e6d25547af174ebec0"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "libc",
- "redox_syscall 0.2.16",
+ "redox_syscall",
  "smallvec",
  "windows-sys 0.42.0",
 ]
@@ -327,7 +177,7 @@ dependencies = [
  "crossbeam-channel",
  "libc",
  "time",
- "winapi 0.3.9",
+ "winapi",
 ]
 
 [[package]]
@@ -348,12 +198,6 @@ dependencies = [
  "proc-macro2",
 ]
 
-[[package]]
-name = "redox_syscall"
-version = "0.1.57"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "41cc0f7e4d5d4544e8861606a285bb08d3e70712ccc7d2b84d7c0ccfaf4b05ce"
-
 [[package]]
 name = "redox_syscall"
 version = "0.2.16"
@@ -378,17 +222,6 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
 
-[[package]]
-name = "signal-hook"
-version = "0.1.17"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e31d442c16f047a671b5a71e2161d6e68814012b7f5379d269ebd915fac2729"
-dependencies = [
- "libc",
- "mio 0.6.23",
- "signal-hook-registry",
-]
-
 [[package]]
 name = "signal-hook"
 version = "0.3.14"
@@ -406,8 +239,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "29ad2e15f37ec9a6cc544097b78a1ec90001e9f71b81338ca39f430adaca99af"
 dependencies = [
  "libc",
- "mio 0.8.4",
- "signal-hook 0.3.14",
+ "mio",
+ "signal-hook",
 ]
 
 [[package]]
@@ -419,15 +252,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "slab"
-version = "0.4.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4614a76b2a8be0058caa9dbbaf66d988527d86d003c11a94fbd335d7661edcef"
-dependencies = [
- "autocfg",
-]
-
 [[package]]
 name = "smallvec"
 version = "1.10.0"
@@ -445,16 +269,6 @@ dependencies = [
  "unicode-ident",
 ]
 
-[[package]]
-name = "terminal"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9cd146db3fbe90911d0bb5498a393abda0af71a2c11e287ecb9ae30cf5d43667"
-dependencies = [
- "bitflags",
- "crossterm 0.15.0",
-]
-
 [[package]]
 name = "thiserror"
 version = "1.0.36"
@@ -483,7 +297,7 @@ checksum = "6db9e6914ab8b1ae1c260a4ae7a49b6c5611b40328a735b21862567685e73255"
 dependencies = [
  "libc",
  "wasi 0.10.0+wasi-snapshot-preview1",
- "winapi 0.3.9",
+ "winapi",
 ]
 
 [[package]]
@@ -498,10 +312,9 @@ version = "0.2.0"
 dependencies = [
  "anyhow",
  "cdivsufsort",
- "crossterm 0.25.0",
+ "crossterm",
  "lexopt",
  "pbr",
- "terminal",
  "thiserror",
 ]
 
@@ -517,12 +330,6 @@ version = "0.11.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
-[[package]]
-name = "winapi"
-version = "0.2.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
-
 [[package]]
 name = "winapi"
 version = "0.3.9"
@@ -533,12 +340,6 @@ dependencies = [
  "winapi-x86_64-pc-windows-gnu",
 ]
 
-[[package]]
-name = "winapi-build"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
-
 [[package]]
 name = "winapi-i686-pc-windows-gnu"
 version = "0.4.0"
@@ -650,13 +451,3 @@ name = "windows_x86_64_msvc"
 version = "0.42.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f40009d85759725a34da6d89a94e63d7bdc50a862acf0dbc7c8e488f1edcb6f5"
-
-[[package]]
-name = "ws2_32-sys"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d59cefebd0c892fa2dd6de581e937301d8552cb44489cdff035c6187cb63fa5e"
-dependencies = [
- "winapi 0.2.8",
- "winapi-build",
-]
diff --git a/Cargo.toml b/Cargo.toml
index 9c46128..b4a3ea3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,5 +12,4 @@ lexopt = "0.2.1"
 anyhow = "1"
 thiserror = "1.0.36"
 pbr = "1"
-crossterm = { version = "0.25.0", default-features = false }
-terminal = { version = "0.2.1", default-features = false, features = ["crossterm-backend"] }
+crossterm = { version = "0.25.0", default-features = false, optional = true }
diff --git a/release/Makefile b/release/Makefile
index f513f96..9bf64a6 100644
--- a/release/Makefile
+++ b/release/Makefile
@@ -23,12 +23,12 @@ upkr-windows-$(VERSION).zip: upkr-windows/upkr.exe PHONY
 	zip -r -9 $@ upkr-windows
 
 upkr-linux/upkr:
-	cargo build --target x86_64-unknown-linux-musl --release
+	cargo build --target x86_64-unknown-linux-musl --release -F crossterm
 	mkdir -p upkr-linux
 	cp ../target/x86_64-unknown-linux-musl/release/upkr upkr-linux/
 
 upkr-windows/upkr.exe:
-	cargo build --target x86_64-pc-windows-gnu --release
+	cargo build --target x86_64-pc-windows-gnu --release -F crossterm
 	mkdir -p upkr-windows
 	cp ../target/x86_64-pc-windows-gnu/release/upkr.exe upkr-windows/
 	
diff --git a/src/heatmap.rs b/src/heatmap.rs
index 663f649..efb6041 100644
--- a/src/heatmap.rs
+++ b/src/heatmap.rs
@@ -72,6 +72,7 @@ impl Heatmap {
         self.data[index]
     }
 
+    #[cfg(feature = "crossterm")]
     pub fn print_as_hex(&self) -> std::io::Result<()> {
         use crossterm::{
             style::{Attribute, Color, Print, SetAttribute, SetBackgroundColor},
diff --git a/src/main.rs b/src/main.rs
index c03938f..6c02c5a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -10,6 +10,7 @@ fn main() -> Result<()> {
     let mut unpack = false;
     let mut calculate_margin = false;
     let mut create_heatmap = false;
+    #[allow(unused_mut)]
     let mut do_hexdump = false;
     let mut level = 2;
     let mut infile: Option<PathBuf> = None;
@@ -61,6 +62,7 @@ fn main() -> Result<()> {
             Short('u') | Long("unpack") => unpack = true,
             Long("margin") => calculate_margin = true,
             Long("heatmap") => create_heatmap = true,
+            #[cfg(feature = "crossterm")]
             Long("hexdump") => do_hexdump = true,
             Short('l') | Long("level") => level = parser.value()?.parse()?,
             Short(n) if n.is_ascii_digit() => level = n as u8 - b'0',
@@ -162,18 +164,20 @@ fn main() -> Result<()> {
             if reverse {
                 heatmap.reverse();
             }
-            if do_hexdump {
-                heatmap.print_as_hex()?;
-            } else {
-                let mut heatmap_bin = Vec::with_capacity(heatmap.len());
-                for i in 0..heatmap.len() {
-                    let cost = (heatmap.cost(i).log2() * 8. + 64.)
-                        .round()
-                        .max(0.)
-                        .min(127.) as u8;
-                    heatmap_bin.push((cost << 1) | heatmap.is_literal(i) as u8);
+            match do_hexdump {
+                #[cfg(feature = "crossterm")]
+                true => heatmap.print_as_hex()?,
+                _ => {
+                    let mut heatmap_bin = Vec::with_capacity(heatmap.len());
+                    for i in 0..heatmap.len() {
+                        let cost = (heatmap.cost(i).log2() * 8. + 64.)
+                            .round()
+                            .max(0.)
+                            .min(127.) as u8;
+                        heatmap_bin.push((cost << 1) | heatmap.is_literal(i) as u8);
+                    }
+                    File::create(outfile(OutFileType::Heatmap))?.write_all(&heatmap_bin)?;
                 }
-                File::create(outfile(OutFileType::Heatmap))?.write_all(&heatmap_bin)?;
             }
         }
         if calculate_margin {