diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 84fb902..f9efbd3 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -18,6 +18,21 @@ env:
   RUSTFLAGS: --deny warnings
 
 jobs:
+  msrv:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v6
+
+    - uses: actions-rust-lang/setup-rust-toolchain@v1
+      with:
+        toolchain: 1.89.0
+
+    - uses: Swatinem/rust-cache@v2
+
+    - name: Check
+      run: cargo check --workspace
+
   all:
     name: All
 
diff --git a/Cargo.toml b/Cargo.toml
index b68d7a0..bc5de0a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,11 +12,13 @@ keywords = ["p2p", "sharing", "bittorrent", "torrent"]
 license.workspace = true
 readme = "README.md"
 repository = "https://github.com/casey/intermodal"
+rust-version.workspace = true
 
 [workspace.package]
 edition = "2021"
 license = "CC0-1.0"
 authors = ["Casey Rodarmor <casey@rodarmor.com>"]
+rust-version = "1.89.0"
 
 [features]
 default = []
diff --git a/bin/demo/Cargo.toml b/bin/demo/Cargo.toml
index 380142d..3bb4162 100644
--- a/bin/demo/Cargo.toml
+++ b/bin/demo/Cargo.toml
@@ -3,4 +3,5 @@ name = "demo"
 version = "0.0.0"
 authors.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 publish = false
diff --git a/bin/gen/Cargo.toml b/bin/gen/Cargo.toml
index ac8f9de..20f4268 100644
--- a/bin/gen/Cargo.toml
+++ b/bin/gen/Cargo.toml
@@ -3,6 +3,7 @@ name = "gen"
 version = "0.0.0"
 authors.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 publish = false
 
 [dependencies]
diff --git a/bin/update-contributors/Cargo.toml b/bin/update-contributors/Cargo.toml
index 5ad9165..587481c 100644
--- a/bin/update-contributors/Cargo.toml
+++ b/bin/update-contributors/Cargo.toml
@@ -3,6 +3,7 @@ name = "update-contributors"
 version = "0.0.0"
 authors.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 publish = false
 
 [dependencies]
diff --git a/build.rs b/build.rs
index db14a8b..efc333f 100644
--- a/build.rs
+++ b/build.rs
@@ -8,8 +8,7 @@ fn is_inside_git_work_tree() -> bool {
     .arg("rev-parse")
     .arg("--is-inside-work-tree")
     .output()
-    .map(|output| String::from_utf8_lossy(&output.stdout).trim() == "true")
-    .unwrap_or(false)
+    .is_ok_and(|output| String::from_utf8_lossy(&output.stdout).trim() == "true")
 }
 
 fn error(message: String) -> io::Error {
diff --git a/src/piece_list.rs b/src/piece_list.rs
index 2662b02..10c77f9 100644
--- a/src/piece_list.rs
+++ b/src/piece_list.rs
@@ -57,23 +57,19 @@ impl<'de> Deserialize<'de> for PieceList {
   {
     let bytes = serde_bytes::ByteBuf::deserialize(deserializer)?.into_vec();
 
-    if bytes.len() % Sha1Digest::LENGTH != 0 {
+    let (chunks, remainder) = bytes.as_chunks::<{ Sha1Digest::LENGTH }>();
+
+    if !remainder.is_empty() {
       return Err(D::Error::custom(format!(
         "buffer length {} is not a multiple of {}",
         bytes.len(),
-        sha1_smol::DIGEST_LENGTH
+        Sha1Digest::LENGTH,
       )));
     }
 
-    let piece_hashes = bytes
-      .chunks_exact(Sha1Digest::LENGTH)
-      .map(|chunk| {
-        Sha1Digest::from_bytes(
-          chunk
-            .try_into()
-            .invariant_unwrap("chunks are all Sha1Digest::LENGTH"),
-        )
-      })
+    let piece_hashes = chunks
+      .iter()
+      .map(|chunk| Sha1Digest::from_bytes(*chunk))
       .collect();
 
     Ok(Self { piece_hashes })
diff --git a/src/table.rs b/src/table.rs
index fe379dd..13696b6 100644
--- a/src/table.rs
+++ b/src/table.rs
@@ -273,14 +273,14 @@ mod tests {
       .write_human_readable(&mut cursor, Style::inactive())
       .unwrap();
     let have = String::from_utf8(cursor.into_inner()).unwrap();
-    assert_eq!(have, want, "have != want:\nHAVE:\n{have}\nWANT:\n{want}",);
+    assert_eq!(have, want, "have != want:\nHAVE:\n{have}\nWANT:\n{want}");
   }
 
   fn tab_delimited(table: &Table, want: &str) {
     let mut cursor = Cursor::new(Vec::new());
     table.write_tab_delimited(&mut cursor).unwrap();
     let have = String::from_utf8(cursor.into_inner()).unwrap();
-    assert_eq!(have, want, "have != want:\nHAVE:\n{have}\nWANT:\n{want}",);
+    assert_eq!(have, want, "have != want:\nHAVE:\n{have}\nWANT:\n{want}");
   }
 
   #[test]