diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
new file mode 100644
index 0000000..da82386
--- /dev/null
+++ b/.github/CODEOWNERS
@@ -0,0 +1,5 @@
+# package-ecosystem: github-actions, directories: /
+/.github/workflows @increments/shared-dev-group
+
+# package-ecosystem: npm, directories: /
+/package.json @increments/shared-dev-group
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..5d51584
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,24 @@
+version: 2
+updates:
+
+  - package-ecosystem: "github-actions"
+    directories:
+      - "/"
+    schedule:
+      interval: "weekly"
+      day: "sunday"
+      timezone: "Asia/Tokyo"
+    open-pull-requests-limit: 5
+    cooldown:
+      default-days: 7
+
+  - package-ecosystem: "npm"
+    directories:
+      - "/"
+    schedule:
+      interval: "weekly"
+      day: "sunday"
+      timezone: "Asia/Tokyo"
+    open-pull-requests-limit: 5
+    cooldown:
+      default-days: 7