diff --git a/.formatter.exs b/.formatter.exs
new file mode 100644
index 00000000..dd1c7400
--- /dev/null
+++ b/.formatter.exs
@@ -0,0 +1,4 @@
+[
+  import_deps: [],
+  inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
+]