diff --git a/dependabot.yml b/dependabot.yml
new file mode 100644
index 0000000..ab52b76
--- /dev/null
+++ b/dependabot.yml
@@ -0,0 +1,9 @@
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "mix"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 20