diff --git a/Cargo.lock b/Cargo.lock
index 2fe5bce..7cb7431 100755
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -116,9 +116,9 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.94"
+version = "1.0.65"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c1fd03a028ef38ba2276dce7e33fcd6369c158a1bca17946c4b1b701891c1ff7"
+checksum = "98161a4e3e2184da77bb14f02184cdd111e83bbbcc9979dfee3c44b9a85f5602"
 
 [[package]]
 name = "apple-bindgen"
@@ -341,25 +341,6 @@ dependencies = [
  "windows-sys 0.48.0",
 ]
 
-[[package]]
-name = "async-process"
-version = "2.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "63255f1dc2381611000436537bbedfe83183faa303a5a0edaf191edef06526bb"
-dependencies = [
- "async-channel 2.3.1",
- "async-io 2.4.0",
- "async-lock 3.4.0",
- "async-signal",
- "async-task",
- "blocking",
- "cfg-if",
- "event-listener 5.3.1",
- "futures-lite 2.5.0",
- "rustix 0.38.41",
- "tracing",
-]
-
 [[package]]
 name = "async-recursion"
 version = "1.1.1"
@@ -391,20 +372,20 @@ dependencies = [
 
 [[package]]
 name = "async-std"
-version = "1.13.0"
+version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c634475f29802fde2b8f0b505b1bd00dfe4df7d4a000f0b36f7671197d5c3615"
+checksum = "62565bb4402e926b29953c785397c6dc0391b7b446e45008b0049eb43cec6f5d"
 dependencies = [
  "async-channel 1.9.0",
  "async-global-executor",
- "async-io 2.4.0",
- "async-lock 3.4.0",
- "async-process 2.3.0",
+ "async-io 1.13.0",
+ "async-lock 2.8.0",
+ "async-process",
  "crossbeam-utils",
  "futures-channel",
  "futures-core",
  "futures-io",
- "futures-lite 2.5.0",
+ "futures-lite 1.13.0",
  "gloo-timers",
  "kv-log-macro",
  "log",
@@ -491,9 +472,9 @@ checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
 
 [[package]]
 name = "batch-channel"
-version = "0.4.2"
+version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ceabc1a50ae0876db2752190f2846ba3afa2ba736d1974aa643c15178afa42f3"
+checksum = "56fcd71a62667be5ee74fc3c6515364ecf278632d0d6801cd4022ec1e14717db"
 dependencies = [
  "futures-core",
  "pin-project",
@@ -550,15 +531,16 @@ checksum = "6099cdc01846bc367c4e7dd630dc5966dccf36b652fae7a74e17b640411a91b2"
 
 [[package]]
 name = "blake3"
-version = "1.5.5"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b8ee0c1824c4dea5b5f81736aff91bae041d2c07ee1192bec91054e10e3e601e"
+checksum = "dcd555c66291d5f836dbb6883b48660ece810fe25a31f3bdfb911945dff2691f"
 dependencies = [
  "arrayref",
  "arrayvec",
  "cc",
  "cfg-if",
  "constant_time_eq",
+ "digest 0.9.0",
 ]
 
 [[package]]
@@ -718,9 +700,9 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "4.5.23"
+version = "4.5.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3135e7ec2ef7b10c6ed8950f0f792ed96ee093fa088608f1c76e569722700c84"
+checksum = "b97f376d85a664d5837dbae44bf546e6477a679ff6610010f17276f686d867e8"
 dependencies = [
  "clap_builder",
  "clap_derive",
@@ -728,9 +710,9 @@ dependencies = [
 
 [[package]]
 name = "clap_builder"
-version = "4.5.23"
+version = "4.5.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "30582fc632330df2bd26877bde0c1f4470d57c582bbc070376afcd04d8cb4838"
+checksum = "19bc80abd44e4bed93ca373a0704ccbd1b710dc5749406201bb018272808dc54"
 dependencies = [
  "anstream",
  "anstyle",
@@ -788,9 +770,9 @@ dependencies = [
 
 [[package]]
 name = "constant_time_eq"
-version = "0.3.1"
+version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7c74b8349d32d297c9134b8c88677813a227df8f779daa29bfc29c183fe3dca6"
+checksum = "245097e9a4535ee1e3e3931fcfcd55a796a44c643e8596ff6566d68f09b87bbc"
 
 [[package]]
 name = "convert_case"
@@ -1039,6 +1021,15 @@ dependencies = [
  "syn 2.0.90",
 ]
 
+[[package]]
+name = "digest"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3dd60d1080a57a05ab032377049e0591415d2b31afd7028356dbf3cc6dcb066"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "digest"
 version = "0.10.7"
@@ -1051,9 +1042,9 @@ dependencies = [
 
 [[package]]
 name = "directories"
-version = "5.0.1"
+version = "5.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9a49173b84e034382284f27f1af4dcbbd231ffa358c0fe316541a7337f376a35"
+checksum = "74be3be809c18e089de43bdc504652bb2bc473fca8756131f8689db8cf079ba9"
 dependencies = [
  "dirs-sys",
 ]
@@ -1243,9 +1234,9 @@ checksum = "431a4c31778fde52b4400de34975f219eeca55cc829a9de157cd743a5b230ecb"
 
 [[package]]
 name = "futures"
-version = "0.3.31"
+version = "0.3.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "65bc07b1a8bc7c85c5f2e110c476c7389b4554ba72af57d8445ea63a576b0876"
+checksum = "90fa4cc29d25b0687b8570b0da86eac698dcb525110ad8b938fe6712baa711ec"
 dependencies = [
  "futures-channel",
  "futures-core",
@@ -1416,9 +1407,9 @@ checksum = "d2fabcfbdc87f4758337ca535fb41a6d701b65693ce38287d856d1674551ec9b"
 
 [[package]]
 name = "gloo-timers"
-version = "0.3.0"
+version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bbb143cf96099802033e0d4f4963b19fd2e0b728bcf076cd9cf7f6634f092994"
+checksum = "9b995a66bb87bebce9a0f4a95aed01daca4872c050bfcb21653361c03bc35e5c"
 dependencies = [
  "futures-channel",
  "futures-core",
@@ -1530,9 +1521,9 @@ checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"
 
 [[package]]
 name = "image"
-version = "0.25.5"
+version = "0.25.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cd6f44aed642f18953a158afeb30206f4d50da59fbc66ecb53c66488de73563b"
+checksum = "99314c8a2152b8ddb211f924cdae532d8c5e4c8bb54728e12fff1b0cd5963a10"
 dependencies = [
  "bytemuck",
  "byteorder-lite",
@@ -1553,9 +1544,9 @@ dependencies = [
 
 [[package]]
 name = "image-webp"
-version = "0.2.0"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e031e8e3d94711a9ccb5d6ea357439ef3dcbed361798bd4071dc4d9793fbe22f"
+checksum = "f79afb8cbee2ef20f59ccd477a218c12a93943d075b492015ecb1bb81f8ee904"
 dependencies = [
  "byteorder-lite",
  "quick-error",
@@ -1932,7 +1923,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8ea1f30cedd69f0a2954655f7188c6a834246d2bcf1e315e2ac40c4b24dc9519"
 dependencies = [
  "cfg-if",
- "rayon",
 ]
 
 [[package]]
@@ -1942,7 +1932,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d89e7ee0cfbedfc4da3340218492196241d89eefb6dab27de5df917a6d2e78cf"
 dependencies = [
  "cfg-if",
- "digest",
+ "digest 0.10.7",
 ]
 
 [[package]]
@@ -2118,6 +2108,16 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "num_cpus"
+version = "1.16.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4161fcb6d602d4d2081af7c3a45852d875a03dd337a6bfdd6e06407b61342a43"
+dependencies = [
+ "hermit-abi 0.3.9",
+ "libc",
+]
+
 [[package]]
 name = "objc"
 version = "0.2.7"
@@ -2200,7 +2200,7 @@ dependencies = [
  "chrono",
  "clap",
  "criterion",
- "digest",
+ "digest 0.10.7",
  "directories",
  "dunce",
  "futures",
@@ -2223,7 +2223,7 @@ dependencies = [
  "sha1",
  "sha2",
  "static_assertions",
- "thiserror 2.0.4",
+ "thiserror 2.0.0",
  "tokio",
  "turbojpeg",
  "vcpkg",
@@ -2543,7 +2543,6 @@ dependencies = [
  "loop9",
  "quick-error",
  "rav1e",
- "rayon",
  "rgb",
 ]
 
@@ -2627,6 +2626,9 @@ name = "rgb"
 version = "0.8.50"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "57397d16646700483b67d2dd6511d79318f9d057fdbd21a4066aeac8b41d310a"
+dependencies = [
+ "bytemuck",
+]
 
 [[package]]
 name = "rusqlite"
@@ -2644,9 +2646,9 @@ dependencies = [
 
 [[package]]
 name = "rusqlite_migration"
-version = "1.3.1"
+version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "923b42e802f7dc20a0a6b5e097ba7c83fe4289da07e49156fecf6af08aa9cd1c"
+checksum = "6f44e7b609eaab5d2232bd2de69f31101b380d4161e9de998a743cef21633679"
 dependencies = [
  "log",
  "rusqlite",
@@ -2753,9 +2755,9 @@ checksum = "e1cf6437eb19a8f4a6cc0f7dca544973b0b78843adbfeb3683d1a94a0024a294"
 
 [[package]]
 name = "self_cell"
-version = "1.1.0"
+version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c2fdfc24bc566f839a2da4c4295b82db7d25a24253867d5c64355abb5799bdbe"
+checksum = "d369a96f978623eb3dc28807c4852d6cc617fed53da5d3c400feff1ef34a714a"
 
 [[package]]
 name = "semver"
@@ -2823,7 +2825,7 @@ checksum = "e3bf829a2d51ab4a5ddf1352d8470c140cadc8301b2ae1789db023f01cedd6ba"
 dependencies = [
  "cfg-if",
  "cpufeatures",
- "digest",
+ "digest 0.10.7",
 ]
 
 [[package]]
@@ -2834,7 +2836,7 @@ checksum = "793db75ad2bcafc3ffa7c68b215fee268f537982cd901d132f89c6343f3a3dc8"
 dependencies = [
  "cfg-if",
  "cpufeatures",
- "digest",
+ "digest 0.10.7",
 ]
 
 [[package]]
@@ -2999,11 +3001,11 @@ dependencies = [
 
 [[package]]
 name = "thiserror"
-version = "2.0.4"
+version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2f49a1853cf82743e3b7950f77e0f4d622ca36cf4317cba00c767838bac8d490"
+checksum = "15291287e9bff1bc6f9ff3409ed9af665bec7a5fc8ac079ea96be07bca0e2668"
 dependencies = [
- "thiserror-impl 2.0.4",
+ "thiserror-impl 2.0.0",
 ]
 
 [[package]]
@@ -3019,9 +3021,9 @@ dependencies = [
 
 [[package]]
 name = "thiserror-impl"
-version = "2.0.4"
+version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8381894bb3efe0c4acac3ded651301ceee58a15d47c2e34885ed1908ad667061"
+checksum = "22efd00f33f93fa62848a7cab956c3d38c8d43095efda1decfc2b3a5dc0b8972"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -3092,20 +3094,21 @@ dependencies = [
 
 [[package]]
 name = "tokio"
-version = "1.42.0"
+version = "1.38.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5cec9b21b0450273377fc97bd4c33a8acffc8c996c987a7c5b319a0083707551"
+checksum = "ba4f4a02a7a80d6f274636f0aa95c7e383b912d41fe721a31f29e29698585a4a"
 dependencies = [
  "backtrace",
+ "num_cpus",
  "pin-project-lite",
  "tokio-macros",
 ]
 
 [[package]]
 name = "tokio-macros"
-version = "2.4.0"
+version = "2.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "693d596312e88961bc67d7f1f97af8a70227d9f90c31bba5806eec004978d752"
+checksum = "5f5ae998a069d4b5aba8ee9dad856af7d520c3699e6159b185c2acd48155d39a"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -3792,7 +3795,7 @@ dependencies = [
  "async-fs",
  "async-io 1.13.0",
  "async-lock 2.8.0",
- "async-process 1.8.1",
+ "async-process",
  "async-recursion",
  "async-task",
  "async-trait",
diff --git a/Cargo.toml b/Cargo.toml
index fec075b..38d6f72 100755
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -37,10 +37,6 @@ vcpkg = "0.2.15"
 
 [dev-dependencies]
 criterion = { version = "0.5.1", features = ["html_reports"] }
-digest = "0.10.7"
-md-5 = "0.10.6"
-sha1 = "0.10.6"
-sha2 = "0.10.8"
 
 [[bench]]
 name = "databasebench"
@@ -54,10 +50,9 @@ blake3 = "1"
 blockhash = "1.0.0"
 chrono = "0.4.38"
 clap = { version = "4.5.20", features = ["derive"] }
+digest = "0.10.7"
 directories = "5"
 dunce = "1.0.5"
-kamadak-exif = "0.6.1"
-keepawake = "0.5.1"
 futures = "0.3"
 hex = "0.4.3"
 image = { version = "0.25.2", features = [] }
@@ -65,11 +60,16 @@ image_hasher = "2.0.0"
 indoc = "2.0.5"
 itermore = { version = "0.7.1", features = ["array_chunks"] }
 jwalk = "0.8.1"
-ntapi = "0.4.1"
+kamadak-exif = "0.6.1"
+keepawake = "0.5.1"
 libheif-rs = { version = "1.0.2", default-features = false }
+md-5 = "0.10.6"
+ntapi = "0.4.1"
 rayon = "1.10.0"
 rusqlite_migration = "1.3.0"
 self_cell = "1.0.4"
+sha1 = "0.10.6"
+sha2 = "0.10.8"
 static_assertions = "1.1.0"
 thiserror = "2.0.0"
 tokio = { version = "1.38", features = ["macros", "rt-multi-thread", "sync"] }
diff --git a/src/main.rs b/src/main.rs
index b5348fd..5ea8dd2 100755
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,8 +1,9 @@
 #![allow(clippy::redundant_pattern_matching)]
 
 use clap::Parser;
+use digest::DynDigest;
 use photohash::iopool;
-use photohash::model::Hash32;
+use photohash::model::{ExtraHashes, Hash32};
 use std::io::Read;
 use std::path::PathBuf;
 
@@ -33,6 +34,44 @@ async fn compute_blake3(path: PathBuf) -> anyhow::Result<Hash32> {
     .await
 }
 
+async fn compute_extra_hashes(path: PathBuf) -> anyhow::Result<ExtraHashes> {
+    // TODO: To save IO, this could be folded into compute_blake3 on
+    // the initial computation.
+
+    iopool::run_in_io_pool(move || {
+        let mut extra_hashes = ExtraHashes::default();
+
+        let mut hash_md5 = md5::Md5::default();
+        let mut hash_sha1 = sha1::Sha1::default();
+        let mut hash_sha256 = sha2::Sha256::default();
+        let mut hashers: [(&mut dyn DynDigest, &mut [u8]); 3] = [
+            (&mut hash_md5, extra_hashes.md5.get_or_insert_default()),
+            (&mut hash_sha1, extra_hashes.sha1.get_or_insert_default()),
+            (&mut hash_sha256, extra_hashes.sha256.get_or_insert_default()),
+        ];
+        let mut file = std::fs::File::open(path)?;
+        let mut buffer = [0u8; READ_SIZE];
+        loop {
+            let n = file.read(&mut buffer)?;
+            if n == 0 {
+                break;
+            }
+            let buffer = &buffer[..n];
+            for (h, _) in &mut hashers {
+                h.update(buffer);
+            }
+        }
+
+
+        for (h, dest) in &mut hashers {
+            h.finalize_into_reset(dest).expect("invalid buffer size");
+        }
+
+        Ok(extra_hashes)
+    })
+    .await
+}
+
 #[derive(Parser)]
 #[command(name = "photohash", about = "Index your files", version)]
 struct Args {