diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..0c7646a
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,19 @@
+declare module 'cachegoose' {
+    import { DocumentQuery, Document, Mongoose } from 'mongoose'
+
+    function cachegoose(mongoose: Mongoose, cacheOptions?: cachegoose.Types.IOptions): void
+
+    namespace cachegoose {
+        namespace Types {
+            interface IOptions {
+                engine?: string
+                port?: number
+                host?: string
+            }
+        }
+
+        function clearCache(customKey: string, cb?: () => void): void
+    }
+
+    export = cachegoose
+}