diff --git a/ban.d.ts b/ban.d.ts
new file mode 100644
index 0000000..8ed3f2b
--- /dev/null
+++ b/ban.d.ts
@@ -0,0 +1 @@
+export default function isBannedFilename (filename: string, logger?: (...args: any[]) => void): boolean;
diff --git a/package.json b/package.json
index 6caa65d..195289d 100644
--- a/package.json
+++ b/package.json
@@ -68,5 +68,6 @@
     "pluralize": "8.0.0",
     "ramda": "0.29.0",
     "update-notifier": "5.1.0"
-  }
+  },
+  "types": "ban.d.ts"
 }