diff --git a/.formatter.exs b/.formatter.exs
new file mode 100644
index 0000000..7c60fa1
--- /dev/null
+++ b/.formatter.exs
@@ -0,0 +1,8 @@
+[
+  inputs: [
+    "test/**/*.{ex,exs}",
+    "lib/**/*.ex",
+    "mix.exs",
+    "config/*.exs",
+  ]
+]