diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 3ad5a0d..243ee42 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -33,3 +33,12 @@ updates:
       cargo:
         patterns:
           - "*"
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    groups:
+      github-actions:
+        patterns: ["*"]
+    schedule:
+      interval: "weekly"
+    cooldown:
+      default-days: 7
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9be05e8..0ab6c4b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,10 +30,10 @@ jobs:
     name: Example Smoke Checks
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with:
           python-version: '3.12'
 
@@ -48,7 +48,7 @@ jobs:
     name: Format Check
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
 
       - name: Install Rust stable
         run: |
@@ -91,7 +91,7 @@ jobs:
     # PG18 failures are non-blocking while compatibility is being established
     continue-on-error: ${{ matrix.pg_version == 18 }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
 
       - name: Free disk space and show usage
         run: |
@@ -124,7 +124,7 @@ jobs:
               libicu-dev
 
       - name: Cache cargo-pgrx tool
-        uses: actions/cache@v5
+        uses: actions/cache@caa296126883cff596d87d8935842f9db880ef25 # v5.1.0
         with:
           path: |
             ~/.cargo/.crates2.json
@@ -132,7 +132,7 @@ jobs:
           key: ${{ runner.os }}-cargo-pgrx-0.16.1-v1
 
       - name: Cache Cargo dependency sources
-        uses: actions/cache@v5
+        uses: actions/cache@caa296126883cff596d87d8935842f9db880ef25 # v5.1.0
         with:
           path: |
             ~/.cargo/registry
@@ -142,7 +142,7 @@ jobs:
             ${{ runner.os }}-cargo-deps-
 
       - name: Cache PostgreSQL build
-        uses: actions/cache@v5
+        uses: actions/cache@caa296126883cff596d87d8935842f9db880ef25 # v5.1.0
         with:
           path: |
             ~/.pgrx/config.toml
@@ -207,7 +207,7 @@ jobs:
 
       - name: Upload PostgreSQL logs on E2E failure
         if: failure()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: postgresql-logs-pg${{ matrix.pg_version }}
           path: |
@@ -221,7 +221,7 @@ jobs:
 
       - name: Upload pg_regress results on failure
         if: steps.pg_regress.outcome == 'failure'
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: pg_regress-results-pg${{ matrix.pg_version }}
           path: |
diff --git a/.github/workflows/copilot-setup-steps.yml b/.github/workflows/copilot-setup-steps.yml
index e4705ea..cd780d5 100644
--- a/.github/workflows/copilot-setup-steps.yml
+++ b/.github/workflows/copilot-setup-steps.yml
@@ -23,7 +23,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@fbc6f3992d24b796d5a048ff273f7fcc4a7b6c09 # v5.1.0
 
       - name: Install Rust toolchain (stable)
         uses: dtolnay/rust-toolchain@stable
@@ -45,7 +45,7 @@ jobs:
               libicu-dev
 
       - name: Cache cargo-pgrx tool
-        uses: actions/cache@v5
+        uses: actions/cache@caa296126883cff596d87d8935842f9db880ef25 # v5.1.0
         with:
           path: |
             ~/.cargo/.crates2.json
@@ -53,7 +53,7 @@ jobs:
           key: ${{ runner.os }}-copilot-setup-cargo-pgrx-0.16.1-v1
 
       - name: Cache Cargo dependency sources
-        uses: actions/cache@v5
+        uses: actions/cache@caa296126883cff596d87d8935842f9db880ef25 # v5.1.0
         with:
           path: |
             ~/.cargo/registry
@@ -63,7 +63,7 @@ jobs:
             ${{ runner.os }}-copilot-setup-cargo-deps-rust-stable-
 
       - name: Cache pgrx PostgreSQL downloads
-        uses: actions/cache@v5
+        uses: actions/cache@caa296126883cff596d87d8935842f9db880ef25 # v5.1.0
         with:
           path: |
             ~/.pgrx/config.toml
diff --git a/.github/workflows/docker-publish.yml b/.github/workflows/docker-publish.yml
index eeca8e3..911d865 100644
--- a/.github/workflows/docker-publish.yml
+++ b/.github/workflows/docker-publish.yml
@@ -66,15 +66,15 @@ jobs:
       # the default branch for release events, or the dispatched branch for
       # workflow_dispatch. The release tag itself may predate this file.
       - name: Checkout tooling
-        uses: actions/checkout@v4
+        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
         with:
           ref: ${{ github.event_name == 'release' && github.event.repository.default_branch || github.ref }}
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0
 
       - name: Log in to GHCR
-        uses: docker/login-action@v3
+        uses: docker/login-action@c94ce9fb468520275223c153574b00df6fe4bcc9 # v3.7.0
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
@@ -169,7 +169,7 @@ jobs:
       # cache hit) so it can attach provenance + SBOM attestations, which the
       # `--load` daemon image store cannot carry.
       - name: Build image (amd64)
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@10e90e3645eae34f1e60eeb005ba3a3d33f178e8 # v6.19.2
         with:
           context: .
           file: ./Dockerfile.release
@@ -305,7 +305,7 @@ jobs:
       # provenance + SBOM attestations to the image in the registry.
       - name: Publish image with attestations (amd64)
         if: ${{ github.event.inputs.dry_run != 'true' && steps.push.outputs.has_tags == 'true' }}
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@10e90e3645eae34f1e60eeb005ba3a3d33f178e8 # v6.19.2
         with:
           context: .
           file: ./Dockerfile.release
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 6a9579e..a212277 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -42,10 +42,10 @@ jobs:
       contents: read
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0
 
       - name: Build Docker image
         run: |
@@ -114,7 +114,7 @@ jobs:
 
       - name: Upload container logs on failure
         if: failure()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: docker-logs
           path: /tmp/docker-logs/
diff --git a/.github/workflows/package-release.yml b/.github/workflows/package-release.yml
index 1ba7ca2..2ce9da6 100644
--- a/.github/workflows/package-release.yml
+++ b/.github/workflows/package-release.yml
@@ -70,7 +70,7 @@ jobs:
             file_pattern: x86-64
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
         with:
           ref: ${{ github.event_name == 'workflow_dispatch' && format('refs/tags/{0}', inputs.tag) || github.ref }}
 
@@ -81,7 +81,7 @@ jobs:
       # github.sha tracks the workflow's own commit for workflow_dispatch and
       # push:tags, keeping YAML and scripts in sync with the branch that ran it.
       - name: Checkout release tooling
-        uses: actions/checkout@v4
+        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
         with:
           ref: ${{ github.sha }}
           path: _release_tooling
@@ -98,7 +98,7 @@ jobs:
           fi
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0
 
       - name: Build pgrx package in Docker
         run: |
@@ -177,7 +177,7 @@ jobs:
           file "check-package/usr/lib/postgresql/${{ matrix.pg_version }}/lib/pg_durable.so" | grep -E "${{ matrix.platform.file_pattern }}"
 
       - name: Upload package artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: pg-durable-package-${{ github.run_id }}-pg${{ matrix.pg_version }}-${{ matrix.platform.type }}
           path: |
@@ -197,7 +197,7 @@ jobs:
             docker_platform: linux/amd64
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
         with:
           ref: ${{ github.event_name == 'workflow_dispatch' && format('refs/tags/{0}', inputs.tag) || github.ref }}
 
@@ -205,13 +205,13 @@ jobs:
       # own commit (github.sha), not the target tag, so a tag predating these
       # scripts still validates correctly.
       - name: Checkout release tooling
-        uses: actions/checkout@v4
+        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
         with:
           ref: ${{ github.sha }}
           path: _release_tooling
 
       - name: Download package artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
           name: pg-durable-package-${{ github.run_id }}-pg${{ matrix.pg_version }}-${{ matrix.platform.type }}
           path: dist
@@ -228,7 +228,7 @@ jobs:
 
       - name: Upload validation diagnostics on failure
         if: failure()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: pg-durable-validation-diagnostics-${{ github.run_id }}-pg${{ matrix.pg_version }}-${{ matrix.platform.type }}
           path: |
@@ -243,7 +243,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
         with:
           ref: ${{ github.event_name == 'workflow_dispatch' && format('refs/tags/{0}', inputs.tag) || github.ref }}
 
@@ -268,7 +268,7 @@ jobs:
           rm "dist/pg_durable-${clean_version}.tar"
 
       - name: Upload source artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: pg-durable-source-${{ github.run_id }}
           path: dist/pg_durable-*.tar.*
@@ -283,7 +283,7 @@ jobs:
       contents: write
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
         with:
           ref: ${{ github.event_name == 'workflow_dispatch' && format('refs/tags/{0}', inputs.tag) || github.ref }}
 
@@ -296,7 +296,7 @@ jobs:
           fi
 
       - name: Download artifacts
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
           path: artifacts
 
diff --git a/.github/workflows/pages.yml b/.github/workflows/pages.yml
index cc0cd5b..225539f 100644
--- a/.github/workflows/pages.yml
+++ b/.github/workflows/pages.yml
@@ -27,16 +27,16 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
 
       - name: Configure Pages
-        uses: actions/configure-pages@v5
+        uses: actions/configure-pages@983d7736d9b0ae728b81ab479565c72886d7745b # v5.0.0
 
       - name: Upload website artifact
-        uses: actions/upload-pages-artifact@v3
+        uses: actions/upload-pages-artifact@56afc609e74202658d3ffba0e8f6dda462b719fa # v3.0.1
         with:
           path: docs/website
 
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v4
+        uses: actions/deploy-pages@d6db90164ac5ed86f2b6aed7e0febac5b3c0c03e # v4.0.5
diff --git a/.github/workflows/prebuild.yml b/.github/workflows/prebuild.yml
index 8d654e4..a2800bc 100644
--- a/.github/workflows/prebuild.yml
+++ b/.github/workflows/prebuild.yml
@@ -24,7 +24,7 @@ jobs:
     
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
 
       - name: Validate devcontainer.json
         run: |
@@ -67,7 +67,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
 
       - name: Smoke test devcontainer scripts
         run: |