diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..783a396
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,37 @@
+version: 2
+updates:
+  # GitHub Actions used across all workflows
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: weekly
+    groups:
+      github-actions:
+        patterns:
+          - "*"
+
+  # Terraform root and provider modules
+  - package-ecosystem: terraform
+    directories:
+      - /terraform
+      - /terraform/grafana
+      - /terraform/hetzner
+      - /terraform/pagerduty
+    schedule:
+      interval: weekly
+    groups:
+      terraform:
+        patterns:
+          - "*"
+
+  # Docker images in service compose files and dotfile Dockerfiles
+  - package-ecosystem: docker
+    directories:
+      - /ansible/services/*
+      - /ansible/dotfiles
+    schedule:
+      interval: weekly
+    groups:
+      docker:
+        patterns:
+          - "*"