diff --git a/.github/ci/rust_version.txt b/.github/ci/rust_version.txt
new file mode 100644
index 00000000..e0d0da1a
--- /dev/null
+++ b/.github/ci/rust_version.txt
@@ -0,0 +1 @@
+1.91.0
\ No newline at end of file
diff --git a/.github/workflows/build_releases.yml b/.github/workflows/build_releases.yml
index 061ef4db..8d1e946b 100644
--- a/.github/workflows/build_releases.yml
+++ b/.github/workflows/build_releases.yml
@@ -135,11 +135,18 @@ jobs:
         with:
           fetch-depth: 1
 
+      # TODO: Make this and the toolchain step a separate wrapper action?
+      - name: Read Rust version
+        shell: bash
+        run: |
+          VER=$(cat .github/ci/rust_version.txt)
+          echo "RUST_VERSION=$VER" >> $GITHUB_ENV
+
       - name: Set up Rust toolchain
         if: matrix.info.container == ''
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9
         with:
-          toolchain: ${{ matrix.info.rust || 'stable' }}
+          toolchain: ${{ matrix.info.rust || env.RUST_VERSION }}
           target: ${{ matrix.info.target }}
 
       - name: Set up Rust toolchain (non-GitHub container)
@@ -338,10 +345,16 @@ jobs:
         run: |
           choco install -y wixtoolset --no-progress;
 
+      - name: Read Rust version
+        shell: bash
+        run: |
+          VER=$(cat .github/ci/rust_version.txt)
+          echo "RUST_VERSION=$VER" >> $GITHUB_ENV
+
       - name: Set up Rust toolchain
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9
         with:
-          toolchain: stable
+          toolchain: ${{ env.RUST_VERSION }}
           target: ${{ matrix.info.target }}
 
       - name: Install cargo-wix
@@ -456,10 +469,16 @@ jobs:
         with:
           fetch-depth: 1
 
+      - name: Read Rust version
+        shell: bash
+        run: |
+          VER=$(cat .github/ci/rust_version.txt)
+          echo "RUST_VERSION=$VER" >> $GITHUB_ENV
+
       - name: Set up Rust toolchain
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9
         with:
-          toolchain: ${{ matrix.info.rust || 'stable' }}
+          toolchain: ${{ matrix.info.rust || env.RUST_VERSION }}
           target: ${{ matrix.info.target }}
 
       # TODO: Could I use the previous jobs to skip this call?
@@ -560,10 +579,16 @@ jobs:
         with:
           fetch-depth: 1
 
+      - name: Read Rust version
+        shell: bash
+        run: |
+          VER=$(cat .github/ci/rust_version.txt)
+          echo "RUST_VERSION=$VER" >> $GITHUB_ENV
+
       - name: Set up Rust toolchain
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9
         with:
-          toolchain: ${{ matrix.info.rust || 'stable' }}
+          toolchain: ${{ matrix.info.rust || env.RUST_VERSION }}
           target: ${{ matrix.info.target }}
 
       # TODO: Could I use the previous jobs to skip this call?
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3630ab3a..d5a4f5cb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -85,10 +85,16 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
 
+      - name: Read Rust version
+        shell: bash
+        run: |
+          VER=$(cat .github/ci/rust_version.txt)
+          echo "RUST_VERSION=$VER" >> $GITHUB_ENV
+
       - name: Set up Rust toolchain
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9
         with:
-          toolchain: stable
+          toolchain: ${{ env.RUST_VERSION }}
           components: rustfmt, clippy
           target: ${{ matrix.info.target }}
 
@@ -239,10 +245,16 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
 
+      - name: Read Rust version
+        shell: bash
+        run: |
+          VER=$(cat .github/ci/rust_version.txt)
+          echo "RUST_VERSION=$VER" >> $GITHUB_ENV
+
       - name: Set up Rust toolchain
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9
         with:
-          toolchain: ${{ matrix.info.rust || 'stable' }}
+          toolchain: ${{ matrix.info.rust || env.RUST_VERSION }}
           target: ${{ matrix.info.target }}
           components: "clippy"
 
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 0c3d62c7..d780e7ec 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -49,10 +49,16 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
 
+      - name: Read Rust version
+        shell: bash
+        run: |
+          VER=$(cat .github/ci/rust_version.txt)
+          echo "RUST_VERSION=$VER" >> $GITHUB_ENV
+
       - name: Set up Rust toolchain
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9
         with:
-          toolchain: stable
+          toolchain: ${{ env.RUST_VERSION }}
 
       - name: Enable Rust cache
         uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # 2.8.1
diff --git a/Cargo.toml b/Cargo.toml
index 9efe9b71..3d579dfe 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -33,7 +33,6 @@ exclude = [
     "codecov.yml",
     "CONTRIBUTING.md",
     "Cross.toml",
-    "rust-toolchain.toml",
     "rustfmt.toml",
 ]
 edition = "2021"