diff --git a/CHANGELOG.md b/CHANGELOG.md
index a94331e..6890d18 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+# docx-wasm@0.0.215 (26. November, 2021)
+
+- Add before/afterLines to LineSpacingJSON.
+
 # docx-wasm@0.0.214 (26. November, 2021)
 
 - Fixed a missed pkg.
diff --git a/README.md b/README.md
index 852356a..6ac46b4 100644
--- a/README.md
+++ b/README.md
@@ -90,7 +90,7 @@ writeFileSync("hello.docx", buffer);
 
 - Node.js 16+
 - yarn 1+
-- wasm-pack (https://rustwasm.github.io/wasm-pack/)
+- wasm-pack0.10.1 (https://rustwasm.github.io/wasm-pack/)
 - insta (https://github.com/mitsuhiko/insta)
 
 ### Examples
@@ -174,6 +174,3 @@ $ yarn test -- --updateSnapshot
 - [ ] Table of contents
 - [ ] Section
 
-## Requirements
-
-- wasm-pack 0.9.1+
diff --git a/docx-wasm/js/json/line_spacing.ts b/docx-wasm/js/json/line_spacing.ts
index d7854d1..496f754 100644
--- a/docx-wasm/js/json/line_spacing.ts
+++ b/docx-wasm/js/json/line_spacing.ts
@@ -1,9 +1,11 @@
 export type LineSpacingJSON = {
-    before: number | null;
-    after: number | null;
-    line: number | null;
-    lineRule: {
-        type: "atLeast" | "auto" | "exact";
-        val: number;
-    } | null;
+  before?: number | null;
+  after?: number | null;
+  beforeLines?: number | null;
+  afterLines?: number | null;
+  line?: number | null;
+  lineRule?: {
+    type: "atLeast" | "auto" | "exact";
+    val: number;
+  } | null;
 };
diff --git a/docx-wasm/package.json b/docx-wasm/package.json
index 27b7937..74f2857 100644
--- a/docx-wasm/package.json
+++ b/docx-wasm/package.json
@@ -1,6 +1,6 @@
 {
   "name": "docx-wasm",
-  "version": "0.0.214",
+  "version": "0.0.215",
   "main": "dist/node/index.js",
   "browser": "dist/web/index.js",
   "author": "bokuweb <bokuweb12@gmail.com>",