diff --git a/.github/workflows/scorecard.yml b/.github/workflows/scorecard.yml
new file mode 100644
index 0000000..6ca0bf8
--- /dev/null
+++ b/.github/workflows/scorecard.yml
@@ -0,0 +1,56 @@
+name: Scorecard
+
+# OpenSSF Scorecard grades the things a reader cannot check by reading the code:
+# whether releases are signed, whether actions are pinned, whether a dangerous
+# workflow trigger is in use, how quickly dependencies are patched. It is the
+# one measure of this repository that is produced by somebody else, which is
+# most of its value -- every other badge here is generated by this project's own
+# CI, and a project grading its own supply chain is the assertion this
+# organisation says it does not accept.
+#
+# The score is published so the badge resolves, and the findings land in the
+# repository's code scanning dashboard beside CodeQL's.
+on:
+  push:
+    branches: [master]   # the default branch is the only one Scorecard supports
+  schedule:
+    - cron: "30 1 * * 6"   # weekly, Saturday 01:30 UTC
+  workflow_dispatch:
+
+permissions: read-all
+
+jobs:
+  analysis:
+    name: Scorecard analysis
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write   # upload the SARIF to code scanning
+      id-token: write          # OIDC token, so the published result is attributable
+
+    steps:
+      # Actions in this workflow are pinned by commit, not by tag: Scorecard's
+      # own Pinned-Dependencies check is the reason, and a workflow that grades
+      # supply chains should not be the one taking a moving tag on trust.
+      - name: Checkout
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      - name: Run analysis
+        uses: ossf/scorecard-action@2d1146689b8cda280b9bc96326124645441f03bc # v2.4.4
+        with:
+          results_file: results.sarif
+          results_format: sarif
+          publish_results: true
+
+      - name: Upload the SARIF as an artifact
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: scorecard-sarif
+          path: results.sarif
+          retention-days: 5
+
+      - name: Upload to code scanning
+        uses: github/codeql-action/upload-sarif@ff2f1c621b7f889edc0d3c761ac2e6a3f8cdb0dd # v4.37.7
+        with:
+          sarif_file: results.sarif
diff --git a/README.md b/README.md
index 11d6c95..20b308c 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,7 @@
 [![CI](https://github.com/DrobyshevDev/mlango/actions/workflows/ci.yml/badge.svg)](https://github.com/DrobyshevDev/mlango/actions/workflows/ci.yml)
 [![CodeQL](https://github.com/DrobyshevDev/mlango/actions/workflows/codeql.yml/badge.svg)](https://github.com/DrobyshevDev/mlango/actions/workflows/codeql.yml)
 [![Coverage](https://codecov.io/gh/DrobyshevDev/mlango/branch/master/graph/badge.svg)](https://codecov.io/gh/DrobyshevDev/mlango)
+[![OpenSSF Scorecard](https://api.scorecard.dev/projects/github.com/DrobyshevDev/mlango/badge)](https://scorecard.dev/viewer/?uri=github.com/DrobyshevDev/mlango)
 [![PyPI](https://img.shields.io/pypi/v/mlango)](https://pypi.org/project/mlango/)
 [![Python](https://img.shields.io/pypi/pyversions/mlango)](https://pypi.org/project/mlango/)
 [![License](https://img.shields.io/pypi/l/mlango)](https://opensource.org/licenses/MIT)
diff --git a/README.ru.md b/README.ru.md
index 228f7e1..2dd936c 100644
--- a/README.ru.md
+++ b/README.ru.md
@@ -7,6 +7,7 @@
 [![CI](https://github.com/DrobyshevDev/mlango/actions/workflows/ci.yml/badge.svg)](https://github.com/DrobyshevDev/mlango/actions/workflows/ci.yml)
 [![CodeQL](https://github.com/DrobyshevDev/mlango/actions/workflows/codeql.yml/badge.svg)](https://github.com/DrobyshevDev/mlango/actions/workflows/codeql.yml)
 [![Coverage](https://codecov.io/gh/DrobyshevDev/mlango/branch/master/graph/badge.svg)](https://codecov.io/gh/DrobyshevDev/mlango)
+[![OpenSSF Scorecard](https://api.scorecard.dev/projects/github.com/DrobyshevDev/mlango/badge)](https://scorecard.dev/viewer/?uri=github.com/DrobyshevDev/mlango)
 [![PyPI](https://img.shields.io/pypi/v/mlango)](https://pypi.org/project/mlango/)
 [![Python](https://img.shields.io/pypi/pyversions/mlango)](https://pypi.org/project/mlango/)
 [![License](https://img.shields.io/pypi/l/mlango)](https://opensource.org/licenses/MIT)