diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index fc33584..a2aae5c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,7 +8,7 @@ on:
 
 jobs:
   ci:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
 
     steps:
       - uses: actions/checkout@v2
@@ -32,10 +32,10 @@ jobs:
         run: cargo doc
 
   nix:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: /nix
           key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 189d066..477b48e 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -10,8 +10,8 @@ on:
 jobs:
 
   release:
-    # Should match the version that Polygott uses.
-    runs-on: ubuntu-18.04
+    # Should match the version reported by /etc/lsb-release on Repls.
+    runs-on: ubuntu-24.04
 
     steps:
       - uses: actions/checkout@v2
diff --git a/src/messages/server.rs b/src/messages/server.rs
index 7eba516..de73082 100644
--- a/src/messages/server.rs
+++ b/src/messages/server.rs
@@ -115,7 +115,7 @@ impl Message {
                                     skip(src, 3 * number_of_colors)?;
 
                                     let bpp = if number_of_colors <= 2 { 1 } else { 8 };
-                                    let row_size = (width * bpp + 7) / 8;
+                                    let row_size = (width * bpp).div_ceil(8);
                                     let uncompressed_size = row_size * height;
 
                                     log::debug!(
@@ -150,7 +150,7 @@ impl Message {
                         // Cursor Pseudo-encoding
                         -239 => {
                             skip(src, width * height * bytes_per_pixel)?;
-                            let row_size = (width + 7) / 8;
+                            let row_size = width.div_ceil(8);
                             skip(src, row_size * height)
                         }
                         // QEMU Extended Key Event Pseudo-encoding
diff --git a/src/rfb.rs b/src/rfb.rs
index 28a4f2a..13de662 100644
--- a/src/rfb.rs
+++ b/src/rfb.rs
@@ -80,7 +80,7 @@ impl RfbConnection {
         })
     }
 
-    pub fn split(&mut self) -> (ReadHalf, WriteHalf) {
+    pub fn split<'a>(&'a mut self) -> (ReadHalf<'a>, WriteHalf<'a>) {
         let (rs, ws) = self.stream.split();
         (
             ReadHalf {