diff --git a/.github/workflows/autotools-cmake.yml b/.github/workflows/autotools-cmake.yml
index 5297a09e..f9bf8c92 100644
--- a/.github/workflows/autotools-cmake.yml
+++ b/.github/workflows/autotools-cmake.yml
@@ -60,7 +60,7 @@ jobs:
         shell: bash
     runs-on: "${{ matrix.os }}"
     steps:
-    - uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b  # v4.1.5
+    - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29  # v4.1.6
 
     - name: (Linux) Install build dependencies
       if: "${{ runner.os == 'Linux' }}"
diff --git a/.github/workflows/clang-format.yml b/.github/workflows/clang-format.yml
index 5d7e7fec..0352b836 100644
--- a/.github/workflows/clang-format.yml
+++ b/.github/workflows/clang-format.yml
@@ -45,7 +45,7 @@ jobs:
     name: Enforce clang-format clean code
     runs-on: ubuntu-22.04
     steps:
-    - uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b  # v4.1.5
+    - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29  # v4.1.6
 
     - name: Install clang-format 18
       run: |-
diff --git a/.github/workflows/clang-tidy.yml b/.github/workflows/clang-tidy.yml
index cea04438..0bc1bbb2 100644
--- a/.github/workflows/clang-tidy.yml
+++ b/.github/workflows/clang-tidy.yml
@@ -45,7 +45,7 @@ jobs:
     name: Enforce clang-tidy clean code
     runs-on: ubuntu-22.04
     steps:
-    - uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b  # v4.1.5
+    - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29  # v4.1.6
 
     - name: Install clang-tidy 18
       run: |-
diff --git a/.github/workflows/cmake-required-version.yml b/.github/workflows/cmake-required-version.yml
index fff0faaf..2eb66fa3 100644
--- a/.github/workflows/cmake-required-version.yml
+++ b/.github/workflows/cmake-required-version.yml
@@ -45,7 +45,7 @@ jobs:
     name: Ensure realistic minimum CMake version requirement
     runs-on: ubuntu-20.04
     steps:
-    - uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b  # v4.1.5
+    - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29  # v4.1.6
 
     - name: Install ancient CMake
       run: |
diff --git a/.github/workflows/codespell.yml b/.github/workflows/codespell.yml
index b19a0d17..6232827f 100644
--- a/.github/workflows/codespell.yml
+++ b/.github/workflows/codespell.yml
@@ -45,7 +45,7 @@ jobs:
     name: Enforce codespell-clean spelling
     runs-on: ubuntu-22.04
     steps:
-    - uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b  # v4.1.5
+    - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29  # v4.1.6
     - uses: codespell-project/actions-codespell@94259cd8be02ad2903ba34a22d9c13de21a74461  # v2.0
       with:
         path: expat/
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index a2f5e00d..5878b776 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -47,7 +47,7 @@ jobs:
     env:
       CFLAGS: -g3 -pipe
     steps:
-    - uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b  # v4.1.5
+    - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29  # v4.1.6
     - name: Install build dependencies
       run: |-
         set -x -u
diff --git a/.github/workflows/cppcheck.yml b/.github/workflows/cppcheck.yml
index 81833e74..6c9a586e 100644
--- a/.github/workflows/cppcheck.yml
+++ b/.github/workflows/cppcheck.yml
@@ -45,7 +45,7 @@ jobs:
     name: Run Cppcheck
     runs-on: macos-14
     steps:
-    - uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b  # v4.1.5
+    - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29  # v4.1.6
     - name: Install runtime dependencies
       run: |
         exec brew install cppcheck
diff --git a/.github/workflows/expat_config_h.yml b/.github/workflows/expat_config_h.yml
index 72e5d635..c789ddeb 100644
--- a/.github/workflows/expat_config_h.yml
+++ b/.github/workflows/expat_config_h.yml
@@ -45,7 +45,7 @@ jobs:
     name: Check expat_config.h.{in,cmake} for regressions
     runs-on: ubuntu-20.04
     steps:
-    - uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b  # v4.1.5
+    - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29  # v4.1.6
     - name: Check expat_config.h.{in,cmake} for regressions
       run: |
         set -v
diff --git a/.github/workflows/fuzzing.yml b/.github/workflows/fuzzing.yml
index 80483fa8..3749cc67 100644
--- a/.github/workflows/fuzzing.yml
+++ b/.github/workflows/fuzzing.yml
@@ -44,7 +44,7 @@ jobs:
     name: Run fuzzing regression tests
     runs-on: ubuntu-22.04
     steps:
-    - uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b  # v4.1.5
+    - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29  # v4.1.6
 
     - name: Install Clang 18
       run: |-
diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index fc771961..d8aadacb 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -87,7 +87,7 @@ jobs:
     env:
       CFLAGS: -g3 -pipe
     steps:
-    - uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b  # v4.1.5
+    - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29  # v4.1.6
     - name: Install build dependencies (MinGW)
       if: "${{ contains(matrix.FLAT_ENV, 'mingw') }}"
       run: |-
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index 152e85a9..998fa6e1 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -53,7 +53,7 @@ jobs:
             FLAT_ENV: CC=clang CXX=clang++ LD=clang++ QA_SANITIZER=address
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b  # v4.1.5
+    - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29  # v4.1.6
     - name: Install build dependencies
       run: |
         sudo rm /usr/local/bin/2to3  # so that "brew link" will work
diff --git a/.github/workflows/valid-xml.yml b/.github/workflows/valid-xml.yml
index 06f8d904..5c38633e 100644
--- a/.github/workflows/valid-xml.yml
+++ b/.github/workflows/valid-xml.yml
@@ -45,7 +45,7 @@ jobs:
     name: Ensure well-formed and valid XML
     runs-on: ubuntu-20.04
     steps:
-    - uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b  # v4.1.5
+    - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29  # v4.1.6
 
     - name: Install build dependencies
       run: |-