diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..1a1ac8f
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,19 @@
+# Weekly Dependabot updates: GitHub Actions and NuGet (grouped).
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: weekly
+    commit-message:
+      prefix: "fix(ci)"
+  - package-ecosystem: nuget
+    directory: /
+    schedule:
+      interval: weekly
+    open-pull-requests-limit: 5
+    groups:
+      dotnet:
+        patterns: ["Microsoft.*", "System.*", "Npgsql.*"]
+    commit-message:
+      prefix: "fix(deps)"