diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 00000000000..5a67576fce0
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,10 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+    groups:
+      github-actions:
+        patterns:
+          - "*"
\ No newline at end of file
diff --git a/.github/workflows/clang-format-fix.yml b/.github/workflows/clang-format-fix.yml
index d701d23a70f..80befa2ea8d 100644
--- a/.github/workflows/clang-format-fix.yml
+++ b/.github/workflows/clang-format-fix.yml
@@ -21,9 +21,9 @@ jobs:
     permissions:
         contents: write # In order to allow EndBug/add-and-commit to commit changes
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
     - name: Fix C and Java formatting issues detected by clang-format
-      uses: DoozyX/clang-format-lint-action@v0.13
+      uses: DoozyX/clang-format-lint-action@9ea72631b74e61ce337d0839a90e76180e997283 # v0.13
       with:
         source: '.'
         extensions: 'c,h,cpp,hpp,java'
@@ -31,7 +31,7 @@ jobs:
         inplace: True
         style: file
         exclude: './config ./hl/src/H5LTanalyze.c ./hl/src/H5LTparse.c ./hl/src/H5LTparse.h ./src/H5Epubgen.h ./src/H5Einit.h ./src/H5Eterm.h ./src/H5Edefin.h ./src/H5version.h ./src/H5overflow.h'
-    - uses: EndBug/add-and-commit@v9
+    - uses: EndBug/add-and-commit@1bad3abcf0d6ec49a5857d124b0bfb52dc7bb081 # v9.1.3
       with:
           author_name: github-actions
           author_email: 41898282+github-actions[bot]@users.noreply.github.com
diff --git a/.github/workflows/release-files.yml b/.github/workflows/release-files.yml
index 5a31544fe5c..2505534fac4 100644
--- a/.github/workflows/release-files.yml
+++ b/.github/workflows/release-files.yml
@@ -40,14 +40,14 @@ jobs:
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
       - name: Get Sources
-        uses: actions/checkout@v4
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
           fetch-depth: 0
 
       - run: |
           git checkout ${{ inputs.file_sha }}
 
-      - uses: rickstaa/action-create-tag@v1
+      - uses: rickstaa/action-create-tag@a1c7777fcb2fee4f19b0f283ba888afa11678b72 # v1.7.2
         id: "tag_create"
         with:
           commit_sha: ${{ inputs.file_sha }}
@@ -75,7 +75,7 @@ jobs:
 
       # Get files created by tarball script
       - name: Get doxygen (Linux)
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@9bc31d5ccc31df68ecc42ccf4149144866c47d8a # v3.0.2
         with:
               name: docs-doxygen
               path: ${{ github.workspace }}/${{ steps.get-file-base.outputs.FILE_BASE }}.doxygen
@@ -84,32 +84,32 @@ jobs:
         run: zip -r ${{ steps.get-file-base.outputs.FILE_BASE }}.doxygen.zip ./${{ steps.get-file-base.outputs.FILE_BASE }}.doxygen
 
       - name: Get tgz-tarball (Linux)
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@9bc31d5ccc31df68ecc42ccf4149144866c47d8a # v3.0.2
         with:
               name: tgz-tarball
               path: ${{ github.workspace }}
 
       - name: Get zip-tarball (Windows)
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@9bc31d5ccc31df68ecc42ccf4149144866c47d8a # v3.0.2
         with:
               name: zip-tarball
               path: ${{ github.workspace }}
 
       # Get files created by cmake-ctest script
       - name: Get published binary (Windows)
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@9bc31d5ccc31df68ecc42ccf4149144866c47d8a # v3.0.2
         with:
               name: zip-vs2022-binary
               path: ${{ github.workspace }}
 
       - name: Get published binary (MacOS)
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@9bc31d5ccc31df68ecc42ccf4149144866c47d8a # v3.0.2
         with:
               name: tgz-osx12-binary
               path: ${{ github.workspace }}
 
       - name: Get published binary (Linux)
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@9bc31d5ccc31df68ecc42ccf4149144866c47d8a # v3.0.2
         with:
               name: tgz-ubuntu-2204-binary
               path: ${{ github.workspace }}
@@ -121,7 +121,7 @@ jobs:
       - name: PreRelease tag
         id: create_prerelease
         if: ${{ (inputs.use_environ == 'snapshots') }}
-        uses: softprops/action-gh-release@v1
+        uses: softprops/action-gh-release@de2c0eb89ae2a093876385947365aca7b0e5f844 # v1
         with:
           tag_name: "${{ inputs.use_tag }}"
           prerelease: true
@@ -138,7 +138,7 @@ jobs:
       - name: Release tag
         id: create_release
         if: ${{ (inputs.use_environ == 'release') }}
-        uses: softprops/action-gh-release@v1
+        uses: softprops/action-gh-release@de2c0eb89ae2a093876385947365aca7b0e5f844 # v1
         with:
           tag_name: "${{ inputs.use_tag }}"
           prerelease: false
@@ -158,7 +158,7 @@ jobs:
               ls ${{ runner.workspace }}
 
       - name: dev-only-docs
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@373f7f263a76c20808c831209c920827a82a2847 # v3.9.3
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ${{ github.workspace }}/${{ steps.get-file-base.outputs.FILE_BASE }}.doxygen