diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index de73259..ab8dc2d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
     name: Build for Linux
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - if: ${{ github.event_name == 'push' }}
       uses: docker/login-action@v3
       with:
@@ -30,7 +30,7 @@ jobs:
 
         # The artifact name will contain the target triple, so the file name doesn't need to.
         mv artifacts/toast-x86_64-unknown-linux-gnu artifacts/toast
-    - uses: actions/upload-artifact@v3
+    - uses: actions/upload-artifact@v4
       with:
         name: x86_64-unknown-linux-gnu
         path: artifacts/toast
@@ -41,7 +41,7 @@ jobs:
 
         # The artifact name will contain the target triple, so the file name doesn't need to.
         mv artifacts/toast-x86_64-unknown-linux-musl artifacts/toast
-    - uses: actions/upload-artifact@v3
+    - uses: actions/upload-artifact@v4
       with:
         name: x86_64-unknown-linux-musl
         path: artifacts/toast
@@ -52,7 +52,7 @@ jobs:
 
         # The artifact name will contain the target triple, so the file name doesn't need to.
         mv artifacts/toast-aarch64-unknown-linux-gnu artifacts/toast
-    - uses: actions/upload-artifact@v3
+    - uses: actions/upload-artifact@v4
       with:
         name: aarch64-unknown-linux-gnu
         path: artifacts/toast
@@ -63,7 +63,7 @@ jobs:
 
         # The artifact name will contain the target triple, so the file name doesn't need to.
         mv artifacts/toast-aarch64-unknown-linux-musl artifacts/toast
-    - uses: actions/upload-artifact@v3
+    - uses: actions/upload-artifact@v4
       with:
         name: aarch64-unknown-linux-musl
         path: artifacts/toast
@@ -72,7 +72,7 @@ jobs:
     name: Build for Windows
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - run: |
         # Make Bash log commands and not silently ignore errors.
         set -euxo pipefail
@@ -103,12 +103,12 @@ jobs:
           --release \
           --target aarch64-pc-windows-msvc
         NO_COLOR=true cargo test --locked # [ref:colorless_tests]
-    - uses: actions/upload-artifact@v3
+    - uses: actions/upload-artifact@v4
       with:
         name: x86_64-pc-windows-msvc
         path: target/x86_64-pc-windows-msvc/release/toast.exe
         if-no-files-found: error
-    - uses: actions/upload-artifact@v3
+    - uses: actions/upload-artifact@v4
       with:
         name: aarch64-pc-windows-msvc
         path: target/aarch64-pc-windows-msvc/release/toast.exe
@@ -117,7 +117,7 @@ jobs:
     name: Build for macOS
     runs-on: macos-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - run: |
         # Make Bash log commands and not silently ignore errors.
         set -euxo pipefail
@@ -141,12 +141,12 @@ jobs:
           MACOSX_DEPLOYMENT_TARGET=$(xcrun --show-sdk-version) \
             cargo build --locked --release --target aarch64-apple-darwin
         NO_COLOR=true cargo test --locked # [ref:colorless_tests]
-    - uses: actions/upload-artifact@v3
+    - uses: actions/upload-artifact@v4
       with:
         name: x86_64-apple-darwin
         path: target/x86_64-apple-darwin/release/toast
         if-no-files-found: error
-    - uses: actions/upload-artifact@v3
+    - uses: actions/upload-artifact@v4
       with:
         name: aarch64-apple-darwin
         path: target/aarch64-apple-darwin/release/toast
@@ -155,7 +155,7 @@ jobs:
     name: Install on macOS
     runs-on: macos-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - run: |
         # Make Bash log commands and not silently ignore errors.
         set -euxo pipefail
@@ -169,7 +169,7 @@ jobs:
     name: Install on Ubuntu
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - run: |
         # Make Bash log commands and not silently ignore errors.
         set -euxo pipefail
@@ -185,8 +185,8 @@ jobs:
     runs-on: ubuntu-latest
     needs: [ci-linux, ci-macos, ci-windows, install-macos, install-ubuntu]
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/download-artifact@v3
+    - uses: actions/checkout@v4
+    - uses: actions/download-artifact@v4
       with:
         path: artifacts/
     - env:
diff --git a/README.md b/README.md
index e597884..d8d1be1 100644
--- a/README.md
+++ b/README.md
@@ -534,7 +534,7 @@ jobs:
   ci:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: stepchowfun/toast/.github/actions/toast@main
 ```
 
@@ -552,7 +552,7 @@ jobs:
   ci:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - if: github.event_name == 'push'
       uses: docker/login-action@v3
       with: