diff --git a/.github/workflows/dependency-review.yml b/.github/workflows/dependency-review.yml
new file mode 100644
index 0000000..7b0990b
--- /dev/null
+++ b/.github/workflows/dependency-review.yml
@@ -0,0 +1,27 @@
+# Dependency Review Action
+#
+# This Action will scan dependency manifest files that change as part of a Pull Request,
+# surfacing known-vulnerable versions of the packages declared or updated in the PR.
+# Once installed, if the workflow run is marked as required,
+# PRs introducing known-vulnerable packages will be blocked from merging.
+#
+# Source repository: https://github.com/actions/dependency-review-action
+name: 'Dependency Review'
+on: [pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  dependency-review:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
+      - name: 'Checkout Repository'
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
+      - name: 'Dependency Review'
+        uses: actions/dependency-review-action@5a2ce3f5b92ee19cbb1541a4984c76d921601d7c # v4.3.4
diff --git a/.github/workflows/part_docs.yml b/.github/workflows/part_docs.yml
index 6c74ee2..94cd242 100644
--- a/.github/workflows/part_docs.yml
+++ b/.github/workflows/part_docs.yml
@@ -18,19 +18,24 @@ jobs:
       attestations: write
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: erlef/setup-elixir@v1
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
+      - uses: erlef/setup-elixir@5304e04ea2b355f03681464e683d92e3b2f18451 # v1.18.2
         id: setupBEAM
         with:
           version-file: .tool-versions
           version-type: strict
-      - uses: actions/cache@v4
+      - uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4.1.1
         with:
           path: _build
           key: docs-build-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ steps.setupBEAM.outputs.elixir-version }}-${{ hashFiles('rebar.config') }}
           restore-keys: |
             docs-build-{{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ steps.setupBEAM.outputs.elixir-version }}-
-      - uses: actions/cache@v4
+      - uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4.1.1
         with:
           path: deps
           key: docs-deps-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ steps.setupBEAM.outputs.elixir-version }}-${{ hashFiles('rebar.config') }}
@@ -44,7 +49,7 @@ jobs:
           tar -czvf docs.tar.gz doc
       
       - name: "Attest docs provenance"
-        uses: actions/attest-build-provenance@v1
+        uses: actions/attest-build-provenance@1c608d11d69870c2092266b3f9a6f3abbf17002c # v1.4.3
         id: attest-docs-provenance
         with:
           subject-path: 'docs.tar.gz'
@@ -53,7 +58,7 @@ jobs:
         env:
           ATTESTATION: "${{ steps.attest-docs-provenance.outputs.bundle-path }}"
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4.4.3
         with:
           name: docs
           path: docs.tar.gz*
diff --git a/.github/workflows/part_publish.yml b/.github/workflows/part_publish.yml
index c1a8df3..937cea0 100644
--- a/.github/workflows/part_publish.yml
+++ b/.github/workflows/part_publish.yml
@@ -22,19 +22,24 @@ jobs:
     if: "${{ inputs.releaseName }}"
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: erlef/setup-beam@v1
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
+      - uses: erlef/setup-beam@5304e04ea2b355f03681464e683d92e3b2f18451 # v1.18.2
         id: setupBEAM
         with:
           version-file: .tool-versions
           version-type: strict
-      - uses: actions/cache@v4
+      - uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4.1.1
         with:
           path: _build
           key: mix_hex_publish-build-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ hashFiles('mix.exs') }}
           restore-keys: |
             mix_hex_publish-build-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-
-      - uses: actions/cache@v4
+      - uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4.1.1
         with:
           path: deps
           key: mix_hex_publish-deps-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ hashFiles('mix.exs') }}
diff --git a/.github/workflows/part_release.yml b/.github/workflows/part_release.yml
index 3de01d6..dc5c9b6 100644
--- a/.github/workflows/part_release.yml
+++ b/.github/workflows/part_release.yml
@@ -24,6 +24,11 @@ jobs:
       contents: write
 
     steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
       - name: Create draft prerelease
         if: ${{ !inputs.stable }}
         env:
@@ -47,7 +52,7 @@ jobs:
             ${{ inputs.releaseName }}
             
       - name: "Download Docs Artifact"
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@fa0a91b85d4f404e444e00e005971372dc801d16 # v4.1.8
         with:
           name: docs
           path: .
diff --git a/.github/workflows/part_test.yml b/.github/workflows/part_test.yml
index 57522a5..929bc4a 100644
--- a/.github/workflows/part_test.yml
+++ b/.github/workflows/part_test.yml
@@ -21,7 +21,12 @@ jobs:
       elixirVersion: "${{ steps.toolVersions.outputs.ELIXIR_VERSION }}"
 
     steps:
-      - uses: actions/checkout@v4
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
       - name: "Read .tool-versions"
         id: toolVersions
         run: |
@@ -43,13 +48,18 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: erlef/setup-beam@v1
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
+      - uses: erlef/setup-beam@5304e04ea2b355f03681464e683d92e3b2f18451 # v1.18.2
         id: setupBEAM
         with:
           version-file: .tool-versions
           version-type: strict
-      - uses: actions/cache@v4
+      - uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4.1.1
         with:
           path: _build
           key: rebar_format-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ hashFiles('rebar.config') }}
@@ -63,19 +73,24 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: erlef/setup-beam@v1
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
+      - uses: erlef/setup-beam@5304e04ea2b355f03681464e683d92e3b2f18451 # v1.18.2
         id: setupBEAM
         with:
           version-file: .tool-versions
           version-type: strict
-      - uses: actions/cache@v4
+      - uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4.1.1
         with:
           path: _build
           key: mix_format-build-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ hashFiles('mix.exs') }}
           restore-keys: |
             mix_format-build-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-
-      - uses: actions/cache@v4
+      - uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4.1.1
         with:
           path: deps
           key: mix_format-deps-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ hashFiles('mix.exs') }}
@@ -105,14 +120,19 @@ jobs:
             unstable: true
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: erlef/setup-beam@v1
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
+      - uses: erlef/setup-beam@5304e04ea2b355f03681464e683d92e3b2f18451 # v1.18.2
         id: setupBEAM
         with:
           otp-version: ${{ matrix.otp }}
           rebar3-version: "${{ needs.detectToolVersions.outputs.rebarVersion }}"
           version-type: strict
-      - uses: actions/cache@v4
+      - uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4.1.1
         with:
           path: _build
           key: eunit-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ hashFiles('rebar.config') }}
@@ -120,7 +140,7 @@ jobs:
             eunit-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-
       - run: rebar3 eunit --cover --cover_export_name "eunit-${{ steps.setupBEAM.outputs.otp-version }}"
         continue-on-error: ${{ matrix.unstable }}
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4.4.3
         if: "${{ matrix.otp == needs.detectToolVersions.outputs.otpVersion }}"
         with:
           name: eunit-coverage-${{ matrix.otp }}
@@ -147,14 +167,19 @@ jobs:
             unstable: true
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: erlef/setup-beam@v1
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
+      - uses: erlef/setup-beam@5304e04ea2b355f03681464e683d92e3b2f18451 # v1.18.2
         id: setupBEAM
         with:
           otp-version: ${{ matrix.otp }}
           rebar3-version: "${{ needs.detectToolVersions.outputs.rebarVersion }}"
           version-type: strict
-      - uses: actions/cache@v4
+      - uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4.1.1
         with:
           path: _build
           key: ct-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ hashFiles('rebar.config') }}
@@ -162,7 +187,7 @@ jobs:
             ct-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-
       - run: rebar3 ct --cover --cover_export_name "ct-${{ steps.setupBEAM.outputs.otp-version }}"
         continue-on-error: ${{ matrix.unstable }}
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4.4.3
         if: "${{ matrix.otp == needs.detectToolVersions.outputs.otpVersion }}"
         with:
           name: ct-coverage-${{ matrix.otp }}
@@ -196,21 +221,26 @@ jobs:
             unstable: true
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: erlef/setup-beam@v1
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
+      - uses: erlef/setup-beam@5304e04ea2b355f03681464e683d92e3b2f18451 # v1.18.2
         id: setupBEAM
         with:
           otp-version: "${{ matrix.otp }}"
           rebar3-version: "${{ needs.detectToolVersions.outputs.rebarVersion }}"
           elixir-version: "${{ matrix.elixir }}"
           version-type: strict
-      - uses: actions/cache@v4
+      - uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4.1.1
         with:
           path: _build
           key: mix_test-build-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ steps.setupBEAM.outputs.elixir-version }}-${{ hashFiles('mix.exs') }}
           restore-keys: |
             mix_test-build-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ steps.setupBEAM.outputs.elixir-version }}-
-      - uses: actions/cache@v4
+      - uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4.1.1
         with:
           path: deps
           key: mix_test-deps-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ steps.setupBEAM.outputs.elixir-version }}-${{ hashFiles('mix.exs') }}
@@ -219,7 +249,7 @@ jobs:
       - run: mix deps.get
       - run: mix test --cover --export-coverage "mix_test-${{ steps.setupBEAM.outputs.elixir-version }}"
         continue-on-error: ${{ matrix.unstable }}
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4.4.3
         if: "${{ matrix.otp == needs.detectToolVersions.outputs.otpVersion }}"
         with:
           name: mix_test-coverage-${{ matrix.elixir }}
@@ -233,19 +263,24 @@ jobs:
     needs: ["eunit", "conformance", "mix_test"]
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: erlef/setup-beam@v1
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
+      - uses: erlef/setup-beam@5304e04ea2b355f03681464e683d92e3b2f18451 # v1.18.2
         id: setupBEAM
         with:
           version-file: .tool-versions
           version-type: strict
-      - uses: actions/cache@v4
+      - uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4.1.1
         with:
           path: _build
           key: mix_test_coverage-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ steps.setupBEAM.outputs.elixir-version }}-${{ hashFiles('mix.exs') }}
           restore-keys: |
             mix_test_coverage-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ steps.setupBEAM.outputs.elixir-version }}-
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@fa0a91b85d4f404e444e00e005971372dc801d16 # v4.1.8
         with:
           path: artifacts
       - name: Unpack Artifacts
@@ -253,7 +288,7 @@ jobs:
           mkdir cover
           mv artifacts/*/*.coverdata cover
           rm -rf artifacts
-      - uses: actions/cache@v4
+      - uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4.1.1
         with:
           path: deps
           key: mix_test_coverage-deps-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ steps.setupBEAM.outputs.elixir-version }}-${{ hashFiles('mix.exs') }}
@@ -261,7 +296,7 @@ jobs:
             mix_test_coverage-deps-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ steps.setupBEAM.outputs.elixir-version }}-
       - run: mix deps.get
       - run: mix test.coverage
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4.4.3
         with:
           name: coverage-report
           path: cover
@@ -274,19 +309,24 @@ jobs:
     needs: ["eunit", "conformance", "mix_test"]
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: erlef/setup-beam@v1
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
+      - uses: erlef/setup-beam@5304e04ea2b355f03681464e683d92e3b2f18451 # v1.18.2
         id: setupBEAM
         with:
           version-file: .tool-versions
           version-type: strict
-      - uses: actions/cache@v4
+      - uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4.1.1
         with:
           path: _build
           key: cover-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ hashFiles('rebar.config') }}
           restore-keys: |
             cover-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@fa0a91b85d4f404e444e00e005971372dc801d16 # v4.1.8
         with:
           path: artifacts
       - name: Unpack Artifacts
@@ -305,13 +345,18 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: erlef/setup-beam@v1
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
+      - uses: erlef/setup-beam@5304e04ea2b355f03681464e683d92e3b2f18451 # v1.18.2
         id: setupBEAM
         with:
           version-file: .tool-versions
           version-type: strict
-      - uses: actions/cache@v4
+      - uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4.1.1
         with:
           path: _build
           key: lint-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ hashFiles('rebar.config') }}
@@ -329,19 +374,24 @@ jobs:
       security-events: write
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: erlef/setup-beam@v1
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
+      - uses: erlef/setup-beam@5304e04ea2b355f03681464e683d92e3b2f18451 # v1.18.2
         id: setupBEAM
         with:
           version-file: .tool-versions
           version-type: strict
-      - uses: actions/cache@v4
+      - uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4.1.1
         with:
           path: _build
           key: credo-build-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ hashFiles('mix.exs') }}
           restore-keys: |
             credo-build-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-
-      - uses: actions/cache@v4
+      - uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4.1.1
         with:
           path: deps
           key: credo-deps-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ hashFiles('mix.exs') }}
@@ -350,7 +400,7 @@ jobs:
       - run: mix deps.get
       - run: mix credo --format sarif > results.sarif
       - name: Upload SARIF file
-        uses: github/codeql-action/upload-sarif@v3
+        uses: github/codeql-action/upload-sarif@f779452ac5af1c261dce0346a8f964149f49322b # v3.26.13
         with:
           sarif_file: results.sarif
           category: credo
@@ -361,19 +411,24 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: erlef/setup-beam@v1
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
+      - uses: erlef/setup-beam@5304e04ea2b355f03681464e683d92e3b2f18451 # v1.18.2
         id: setupBEAM
         with:
           version-file: .tool-versions
           version-type: strict
-      - uses: actions/cache@v4
+      - uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4.1.1
         with:
           path: _build
           key: dialyxir-build-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ hashFiles('mix.exs') }}
           restore-keys: |
             dialyxir-build-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-
-      - uses: actions/cache@v4
+      - uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4.1.1
         with:
           path: deps
           key: dialyxir-deps-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ hashFiles('mix.exs') }}
@@ -388,13 +443,18 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: erlef/setup-beam@v1
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
+      - uses: erlef/setup-beam@5304e04ea2b355f03681464e683d92e3b2f18451 # v1.18.2
         id: setupBEAM
         with:
           version-file: .tool-versions
           version-type: strict
-      - uses: actions/cache@v4
+      - uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4.1.1
         with:
           path: _build
           key: dialyzer-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ hashFiles('rebar.config') }}
@@ -408,13 +468,18 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: erlef/setup-beam@v1
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
+      - uses: erlef/setup-beam@5304e04ea2b355f03681464e683d92e3b2f18451 # v1.18.2
         id: setupBEAM
         with:
           version-file: .tool-versions
           version-type: strict
-      - uses: actions/cache@v4
+      - uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4.1.1
         with:
           path: _build
           key: hank-${{ runner.os }}-${{ steps.setupBEAM.outputs.otp-version }}-${{ hashFiles('rebar.config') }}
diff --git a/.github/workflows/scorecards.yml b/.github/workflows/scorecards.yml
new file mode 100644
index 0000000..e8fc8e4
--- /dev/null
+++ b/.github/workflows/scorecards.yml
@@ -0,0 +1,81 @@
+# This workflow uses actions that are not certified by GitHub. They are provided
+# by a third-party and are governed by separate terms of service, privacy
+# policy, and support documentation.
+
+name: Scorecard supply-chain security
+on:
+  # For Branch-Protection check. Only the default branch is supported. See
+  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#branch-protection
+  branch_protection_rule:
+  # To guarantee Maintained check is occasionally updated. See
+  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#maintained
+  schedule:
+    - cron: '20 7 * * 2'
+  push:
+    branches: ["main"]
+
+# Declare default permissions as read only.
+permissions: read-all
+
+jobs:
+  analysis:
+    name: Scorecard analysis
+    runs-on: ubuntu-latest
+    permissions:
+      # Needed to upload the results to code-scanning dashboard.
+      security-events: write
+      # Needed to publish results and get a badge (see publish_results below).
+      id-token: write
+      contents: read
+      actions: read
+      # To allow GraphQL ListCommits to work
+      issues: read
+      pull-requests: read
+      # To detect SAST tools
+      checks: read
+
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
+      - name: "Checkout code"
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
+        with:
+          persist-credentials: false
+
+      - name: "Run analysis"
+        uses: ossf/scorecard-action@dc50aa9510b46c811795eb24b2f1ba02a914e534 # v2.3.3
+        with:
+          results_file: results.sarif
+          results_format: sarif
+          # (Optional) "write" PAT token. Uncomment the `repo_token` line below if:
+          # - you want to enable the Branch-Protection check on a *public* repository, or
+          # - you are installing Scorecards on a *private* repository
+          # To create the PAT, follow the steps in https://github.com/ossf/scorecard-action#authentication-with-pat.
+          # repo_token: ${{ secrets.SCORECARD_TOKEN }}
+
+          # Public repositories:
+          #   - Publish results to OpenSSF REST API for easy access by consumers
+          #   - Allows the repository to include the Scorecard badge.
+          #   - See https://github.com/ossf/scorecard-action#publishing-results.
+          # For private repositories:
+          #   - `publish_results` will always be set to `false`, regardless
+          #     of the value entered here.
+          publish_results: true
+
+      # Upload the results as artifacts (optional). Commenting out will disable uploads of run results in SARIF
+      # format to the repository Actions tab.
+      - name: "Upload artifact"
+        uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4.4.3
+        with:
+          name: SARIF file
+          path: results.sarif
+          retention-days: 5
+
+      # Upload the results to GitHub's code scanning dashboard.
+      - name: "Upload to code-scanning"
+        uses: github/codeql-action/upload-sarif@f779452ac5af1c261dce0346a8f964149f49322b # v3.26.13
+        with:
+          sarif_file: results.sarif