diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index b0e1cfa3aef..87fbe9b80bb 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -28,6 +28,25 @@ updates:
   # GitHub Actions used by PR-check workflows.
   - package-ecosystem: github-actions
     directory: /
+    target-branch: "4.0"
+    schedule:
+      interval: weekly
+    open-pull-requests-limit: 5
+    labels:
+      - dependencies
+      - github-actions
+    # github-actions cooldown only supports a flat default-days (no semver granularity).
+    cooldown:
+      default-days: 7
+    groups:
+      actions:
+        patterns:
+          - "*"
+
+  # GitHub Actions used by PR-check workflows on the 3.0-dev branch.
+  - package-ecosystem: github-actions
+    directory: /
+    target-branch: "3.0-dev"
     schedule:
       interval: weekly
     open-pull-requests-limit: 5