diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index a0786ef74..104d179a5 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -37,11 +37,11 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       # Initializes the CodeQL tools for scanning.
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@51f77329afa6477de8c49fc9c7046c15b9a4e79d # v3.29.5
+        uses: github/codeql-action/init@3c3833e0f8c1c83d449a7478aa59c036a9165498 # v3.29.5
         with:
           languages: ${{ matrix.language }}
           # If you wish to specify custom queries, you can do so here or in a config file.
@@ -50,7 +50,7 @@ jobs:
           # queries: ./path/to/local/query, your-org/your-repo/queries@main
 
       - name: Setup Java
-        uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00 # v4.3.0
+        uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165 # v4.3.0
         with:
           distribution: 'corretto'
           java-version: 11
@@ -58,7 +58,7 @@ jobs:
       # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
       # If this step fails, then you should remove it and run the build manually (see below)
       - name: Autobuild
-        uses: github/codeql-action/autobuild@51f77329afa6477de8c49fc9c7046c15b9a4e79d # v3.29.5
+        uses: github/codeql-action/autobuild@3c3833e0f8c1c83d449a7478aa59c036a9165498 # v3.29.5
 
       # ℹ️ Command-line programs to run using the OS shell.
       # 📚 https://git.io/JvXDl
@@ -72,4 +72,4 @@ jobs:
       #   make release
 
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@51f77329afa6477de8c49fc9c7046c15b9a4e79d # v3.29.5
+        uses: github/codeql-action/analyze@3c3833e0f8c1c83d449a7478aa59c036a9165498 # v3.29.5
diff --git a/.github/workflows/ion-java-performance-regression-detector.yml b/.github/workflows/ion-java-performance-regression-detector.yml
index fa6866a3b..8d6a394a2 100644
--- a/.github/workflows/ion-java-performance-regression-detector.yml
+++ b/.github/workflows/ion-java-performance-regression-detector.yml
@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout ion-data-generator
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           repository: amazon-ion/ion-data-generator
           ref: main
@@ -85,27 +85,27 @@ jobs:
 
     steps:
       - name: Set up JDK 17
-        uses: actions/setup-java@v4.7.1
+        uses: actions/setup-java@v5.0.0
         with:
           distribution: 'corretto'
           java-version: 17
 
       - name: Checkout ion-java-benchmark-cli
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           repository: amazon-ion/ion-java-benchmark-cli
           ref: master
           path: ion-java-benchmark-cli
 
       - name: Checkout ion-java from the previous commit
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           ref: ${{ github.base_ref }}
           submodules: recursive
           path: baseline
 
       - name: Checkout ion-java from the new commit.
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           repository: ${{ github.event.pull_request.head.repo.full_name }}
           ref: ${{ github.head_ref }}
@@ -113,7 +113,7 @@ jobs:
           path: new
 
       - name: Download test Ion Data from artifacts
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v5
         with:
           name: generated-test-data
           path: testData
diff --git a/.github/workflows/ion-test-driver.yml b/.github/workflows/ion-test-driver.yml
index 1232e7a76..a3cf47a77 100644
--- a/.github/workflows/ion-test-driver.yml
+++ b/.github/workflows/ion-test-driver.yml
@@ -13,14 +13,14 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout ion-java
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # master
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # master
         with:
           repository: amazon-ion/ion-java
           ref: master
           path: ion-java
 
       - name: Checkout ion-test-driver
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # master
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # master
         with:
           repository: amazon-ion/ion-test-driver
           ref: master
@@ -85,7 +85,7 @@ jobs:
     needs: ion-test-driver
     if: ${{ failure() }}
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # master
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # master
       - name: Open an issue
         uses: JasonEtco/create-an-issue@1b14a70e4d8dc185e5cc76d3bec9eab20257b2c5 # v2.9.2
         env:
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index cc1d8be6f..a180fe9f0 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -17,20 +17,20 @@ jobs:
     # H/T: https://github.com/Dart-Code/Dart-Code/commit/612732d5879730608baa9622bf7f5e5b7b51ae65
     if: github.event_name == 'push' || github.event.pull_request.head.repo.full_name != 'amazon-ion/ion-java'
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           submodules: recursive
       - name: Setup Java
-        uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00 # v4.3.0
+        uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165 # v4.3.0
         with:
           distribution: ${{ env.JAVA_DISTRIBUTION}}
           java-version: ${{ env.JAVA_VERSION}}
       - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@ac638b010cf58a27ee6c972d7336334ccaf61c96
+        uses: gradle/actions/setup-gradle@017a9effdb900e5b5b2fddfb590a105619dca3c3
         with:
           validate-wrappers: true
       - run: ./gradlew build
-      - uses: codecov/codecov-action@18283e04ce6e62d37312384ff67231eb8fd56d24 # v5.4.3
+      - uses: codecov/codecov-action@fdcc8476540edceab3de004e990f80d881c6cc00 # v5.5.0
         with:
           files: build/reports/jacoco/test/jacocoTestReport.xml
       - uses: actions/upload-artifact@1eb3cb2b3e0f29609092a73eb033bb759a334595 # v4.1.0
@@ -48,16 +48,16 @@ jobs:
     runs-on: ubuntu-latest
     if: github.event_name == 'push' || github.event.pull_request.head.repo.full_name != 'amazon-ion/ion-java'
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           submodules: recursive
       - name: Setup Java
-        uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00 # v4.3.0
+        uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165 # v4.3.0
         with:
           distribution: ${{ env.JAVA_DISTRIBUTION}}
           java-version: ${{ env.JAVA_VERSION}}
       - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@ac638b010cf58a27ee6c972d7336334ccaf61c96
+        uses: gradle/actions/setup-gradle@017a9effdb900e5b5b2fddfb590a105619dca3c3
         with:
           cache-read-only: true
           validate-wrappers: true
@@ -70,7 +70,7 @@ jobs:
     # https://github.com/amazon-ion/ion-java/blob/master/.github/actions/inspect-version/action.yml
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v3.6.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v3.6.0
       - name: Get Project Version
         run: |
           echo "PROJECT_VERSION=v$(<project.version)" >> $GITHUB_ENV
diff --git a/.github/workflows/prepare-release.yml b/.github/workflows/prepare-release.yml
index b30eab976..3a7c891c6 100644
--- a/.github/workflows/prepare-release.yml
+++ b/.github/workflows/prepare-release.yml
@@ -44,7 +44,7 @@ jobs:
     outputs:
       should_create_draft: ${{ steps.inspect.outputs.is_valid_to_release }}
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v3.6.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v3.6.0
       - name: Get project version
         run: |
           echo "PROJECT_VERSION=$(<project.version)" >> $GITHUB_ENV
@@ -65,7 +65,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v3.6.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v3.6.0
       - name: Create a draft release
         shell: bash
         env:
diff --git a/.github/workflows/publish-release-artifacts.yml b/.github/workflows/publish-release-artifacts.yml
index 85da88de0..fbe4dd0c5 100644
--- a/.github/workflows/publish-release-artifacts.yml
+++ b/.github/workflows/publish-release-artifacts.yml
@@ -30,7 +30,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v3.6.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v3.6.0
         with:
           submodules: recursive
       - name: Validate project version matches tag
@@ -42,7 +42,7 @@ jobs:
           echo "Project Version: $PROJECT_VERSION"
           echo "Release Tag: $RELEASE_TAG"
           [ "$PROJECT_VERSION" = "$RELEASE_TAG" ] || exit 1
-      - uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00 # v4.3.0
+      - uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165 # v4.3.0
         with:
           distribution: 'corretto'
           java-version: |
@@ -50,7 +50,7 @@ jobs:
             11
             17
             21
-      - uses: gradle/actions/setup-gradle@ac638b010cf58a27ee6c972d7336334ccaf61c96
+      - uses: gradle/actions/setup-gradle@017a9effdb900e5b5b2fddfb590a105619dca3c3
         with:
           validate-wrappers: true
       - name: Build Release Artifacts
diff --git a/.github/workflows/scorecard.yml b/.github/workflows/scorecard.yml
index 16459c923..8ab49495a 100644
--- a/.github/workflows/scorecard.yml
+++ b/.github/workflows/scorecard.yml
@@ -32,7 +32,7 @@ jobs:
 
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v3.1.0
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v3.1.0
         with:
           persist-credentials: false
 
@@ -67,6 +67,6 @@ jobs:
 
       # Upload the results to GitHub's code scanning dashboard.
       - name: "Upload to code-scanning"
-        uses: github/codeql-action/upload-sarif@51f77329afa6477de8c49fc9c7046c15b9a4e79d # v3.29.5
+        uses: github/codeql-action/upload-sarif@3c3833e0f8c1c83d449a7478aa59c036a9165498 # v3.29.5
         with:
           sarif_file: results.sarif
diff --git a/.github/workflows/test-inspect-version-action.yml b/.github/workflows/test-inspect-version-action.yml
index e53e2df6d..9a271054d 100644
--- a/.github/workflows/test-inspect-version-action.yml
+++ b/.github/workflows/test-inspect-version-action.yml
@@ -53,7 +53,7 @@ jobs:
             expected: action_failure
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v3.6.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v3.6.0
       - name: Invoke Action
         id: inspect
         continue-on-error: ${{ matrix.expected == 'action_failure' }}