diff --git a/.github/workflows/cocoapods.yml b/.github/workflows/cocoapods.yml
index 4275380..0e7409d 100644
--- a/.github/workflows/cocoapods.yml
+++ b/.github/workflows/cocoapods.yml
@@ -32,7 +32,7 @@ jobs:
         PLATFORM: ["ios", "macos", "tvos", "watchos --skip-tests"]
         CONFIGURATION: ["Debug", "Release"]
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     # Need cocoapods 1.12+ for watchOS to work again.
     - name: Update Cocoapods
       run: gem update cocoapods
diff --git a/.github/workflows/swiftpm.yml b/.github/workflows/swiftpm.yml
index 1775046..b7ee680 100644
--- a/.github/workflows/swiftpm.yml
+++ b/.github/workflows/swiftpm.yml
@@ -32,7 +32,7 @@ jobs:
       matrix:
         CONFIGURATION: ["debug", "release"]
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Build and Test
       run:  |
         set -eu
@@ -49,7 +49,7 @@ jobs:
         PLATFORM: ["ios", "macos", "tvos", "watchos"]
         CONFIGURATION: ["Debug", "Release"]
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Build and Test
       run:  |
         set -eu
diff --git a/.github/workflows/test_apps.yml b/.github/workflows/test_apps.yml
index e84ab4e..293d955 100644
--- a/.github/workflows/test_apps.yml
+++ b/.github/workflows/test_apps.yml
@@ -28,7 +28,7 @@ jobs:
         PLATFORM: ["macOS"]
         CONFIGURATION: ["Debug", "Release"]
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Build
       run:  |
         set -eu