diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c642740..a9fff11 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -90,8 +90,8 @@ jobs:
         #   https://github.com/rust-lang/rustup/issues/2441
         #
         # for more information.
-        rustup toolchain install 1.97.1 --no-self-update # [ref:rust_1.97.1]
-        rustup default 1.97.1 # [ref:rust_1.97.1]
+        rustup toolchain install 1.98.0 --no-self-update # [ref:rust_1.98.0]
+        rustup default 1.98.0 # [ref:rust_1.98.0]
 
         # Add the targets.
         rustup target add x86_64-pc-windows-msvc
@@ -131,8 +131,8 @@ jobs:
         set -euxo pipefail
 
         # Install the appropriate version of Rust.
-        rustup toolchain install 1.97.1 # [ref:rust_1.97.1]
-        rustup default 1.97.1 # [ref:rust_1.97.1]
+        rustup toolchain install 1.98.0 # [ref:rust_1.98.0]
+        rustup default 1.98.0 # [ref:rust_1.98.0]
 
         # Add the targets.
         rustup target add x86_64-apple-darwin
@@ -211,8 +211,8 @@ jobs:
         set -euxo pipefail
 
         # Install the appropriate version of Rust.
-        rustup toolchain install 1.97.1 # [ref:rust_1.97.1]
-        rustup default 1.97.1 # [ref:rust_1.97.1]
+        rustup toolchain install 1.98.0 # [ref:rust_1.98.0]
+        rustup default 1.98.0 # [ref:rust_1.98.0]
 
         # Fetch the program version.
         VERSION="$(cargo pkgid | cut -d# -f2 | cut -d: -f2)"
@@ -255,7 +255,7 @@ jobs:
         chmod a+x artifacts/docuum-x86_64-unknown-linux-musl
         chmod a+x artifacts/docuum-aarch64-unknown-linux-musl
     - if: ${{ env.VERSION_TO_PUBLISH != null }}
-      uses: docker/setup-buildx-action@v4.2.0 # For building multi-platform images
+      uses: docker/setup-buildx-action@v4.3.0 # For building multi-platform images
     - if: ${{ env.VERSION_TO_PUBLISH != null }}
       uses: docker/setup-qemu-action@v4.2.0 # For building multi-platform images
     - if: ${{ env.VERSION_TO_PUBLISH != null }}
diff --git a/Cargo.lock b/Cargo.lock
index 5fefb19..9d52f5c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -198,9 +198,9 @@ checksum = "fc652a48c352aef3ea3aed32080501cf3ef6ed5da78602a020c991775b0aff04"
 
 [[package]]
 name = "cc"
-version = "1.4.3"
+version = "1.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "509591b7bcd67f4ef775afad7662703b4935daaa6ec0e5605cfb1090b32a2b6d"
+checksum = "0ad534f4357a5264cce5019c989cf66a4f0dc4e0d1b1d15f8aacec0ff7360273"
 dependencies = [
  "find-msvc-tools",
  "shlex",
@@ -894,18 +894,18 @@ dependencies = [
 
 [[package]]
 name = "ref-cast"
-version = "1.0.26"
+version = "1.0.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "216e8f773d7923bcba9ceb86a86c93cabb3903a11872fc3f138c49630e50b96d"
+checksum = "7e440fb4e4b4147295338efb76001ab9e4efc0e5839df2c47fc5ac2381d365c3"
 dependencies = [
  "ref-cast-impl",
 ]
 
 [[package]]
 name = "ref-cast-impl"
-version = "1.0.26"
+version = "1.0.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2c9283685feec7d69af75fb0e858d5e7378f33fe4fc699383b2916ab9273e03c"
+checksum = "92ecd8964f8453721699a1ed72037b0db49ce2f5a5138486ee89bed6f67cdf3a"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1494,9 +1494,9 @@ dependencies = [
 
 [[package]]
 name = "yaml_serde"
-version = "0.10.6"
+version = "0.10.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ad7a8266fc7ce9d77db272ca5b40b704a1753e2a2e2ab7b1f2da22672941bf93"
+checksum = "33b729a08a9a6be689bbad3e2bf8015926db54b6622cc89c3a5f7dc174b9e918"
 dependencies = [
  "indexmap",
  "itoa",
diff --git a/Cargo.toml b/Cargo.toml
index d45a1e4..cc96733 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,7 +28,7 @@ log = "0.4.33"
 regex = { version = "1.13.1", default-features = false, features = ["std", "unicode-perl"] }
 serde = { version = "1.0.229", features = ["derive"] }
 serde_json = "1.0.151"
-yaml_serde = "0.10.6"
+yaml_serde = "0.10.7"
 tempfile = "3.27.0"
 
 [target.'cfg(target_os = "linux")'.dependencies]
diff --git a/toast.yml b/toast.yml
index 2b423e9..032bda4 100644
--- a/toast.yml
+++ b/toast.yml
@@ -17,11 +17,11 @@ command_prefix: |
   cargo-offline () { cargo --frozen --offline "$@"; }
 
   # Use this wrapper for formatting code or checking that code is formatted. We use a nightly Rust
-  # version for the `trailing_comma` formatting option [tag:rust_fmt_nightly_2026-07-18]. The
+  # version for the `trailing_comma` formatting option [tag:rust_fmt_nightly_2026-08-21]. The
   # nightly version was chosen as the latest available release with all components present
   # according to this page:
   #   https://rust-lang.github.io/rustup-components-history/x86_64-unknown-linux-gnu.html
-  cargo-fmt () { cargo +nightly-2026-07-18 --frozen --offline fmt --all -- "$@"; }
+  cargo-fmt () { cargo +nightly-2026-08-21 --frozen --offline fmt --all -- "$@"; }
 
   # Make Bash log commands.
   set -x
@@ -92,18 +92,18 @@ tasks:
       - install_packages
       - create_user
     command: |
-      # Install stable Rust [tag:rust_1.97.1].
+      # Install stable Rust [tag:rust_1.98.0].
       curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- \
         -y \
-        --default-toolchain 1.97.1 \
+        --default-toolchain 1.98.0 \
         --profile minimal \
         --component clippy
 
       # Add Rust tools to `$PATH`.
       . "$HOME/.cargo/env"
 
-      # Install nightly Rust [ref:rust_fmt_nightly_2026-07-18].
-      rustup toolchain install nightly-2026-07-18 --profile minimal --component rustfmt
+      # Install nightly Rust [ref:rust_fmt_nightly_2026-08-21].
+      rustup toolchain install nightly-2026-08-21 --profile minimal --component rustfmt
 
   install_tools:
     description: Install the tools needed to build and validate the program.