diff --git a/package.json b/package.json
index f3782afa..ca189855 100644
--- a/package.json
+++ b/package.json
@@ -65,9 +65,10 @@
   },
   "author": "unadlib",
   "keywords": [
-    "mutative",
     "immutable",
     "mutable",
+    "copy-on-write",
+    "mutative",
     "immutability",
     "mutation"
   ],
diff --git a/src/index.ts b/src/index.ts
index 46f9ab10..bb762b2f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -16,4 +16,5 @@ export type {
   Patches,
   Patch,
   ExternalOptions as Options,
+  PatchesOptions,
 } from './interface';