diff --git a/README.md b/README.md
index 06b2de88..533dde0f 100644
--- a/README.md
+++ b/README.md
@@ -115,7 +115,7 @@ You can also run `swift-graphql help` to learn more about options and how it wor
 
 ---
 
-<!-- index-start -->
+  <!-- index-start -->
 
 - [Why?](#why)
 - [How does it work?](#howdoesitwork)
@@ -142,8 +142,7 @@ You can also run `swift-graphql help` to learn more about options and how it wor
   - [What are the pitfalls in Apollo iOS that you were referring to at the top?](#whatarethepitfallsinapolloiosthatyouwerereferringtoatthetop)
 - [Roadmap and Contributing](#roadmapandcontributing)
 - [Thank you](#thankyou)
-  - [License](#license)
-
+- [License](#license)
 <!-- index-end -->
 
 ## Why?
diff --git a/package.json b/package.json
index d1267ba7..cdf179a4 100644
--- a/package.json
+++ b/package.json
@@ -13,6 +13,7 @@
   },
   "devDependencies": {
     "@types/marked": "^1.2.2",
+    "@types/prettier": "^2.2.1",
     "husky": "^4.3.6",
     "marked": "^2.0.0",
     "prettier": "^2.2.1",
diff --git a/scripts/index.ts b/scripts/index.ts
index ca7a87d8..e4b4d871 100644
--- a/scripts/index.ts
+++ b/scripts/index.ts
@@ -1,6 +1,7 @@
 import fs from 'fs'
-import path from 'path'
 import marked from 'marked'
+import path from 'path'
+import prettier from 'prettier'
 import { promisify } from 'util'
 
 const readfile = promisify(fs.readFile)
@@ -35,7 +36,20 @@ main()
  * Updates table of contents with a given index.
  */
 function update(raw: string, index: string): string {
-  return raw.replace(/<!-- index-start -->([\w\W]*)<!-- index-end -->/, index)
+  index = `
+  <!-- index-start -->
+  ${index}
+  <!-- index-end -->
+  `
+
+  const source = raw.replace(
+    /<!-- index-start -->([\w\W]*)<!-- index-end -->/,
+    index,
+  )
+
+  return prettier.format(source, {
+    parser: 'markdown',
+  })
 }
 
 /**
diff --git a/scripts/tsconfig.json b/scripts/tsconfig.json
index 0bb0b250..35da856d 100644
--- a/scripts/tsconfig.json
+++ b/scripts/tsconfig.json
@@ -8,5 +8,5 @@
 
     "esModuleInterop": true
   },
-  "include": ["./**/*.ts"]
+  "include": ["./*.ts"]
 }
diff --git a/yarn.lock b/yarn.lock
index a3c35f73..ba058d20 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3064,6 +3064,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@types/prettier@npm:^2.2.1":
+  version: 2.2.1
+  resolution: "@types/prettier@npm:2.2.1"
+  checksum: 9dc257dfc51eab6bc1e9ce58df94b309a206b2cdc6768709de3d20f70ae545c616bbc46add6d66f66cfa6cfbb0613dd09e6b6028ff6ff8ba9d3625f38d85cc66
+  languageName: node
+  linkType: hard
+
 "@types/prop-types@npm:*":
   version: 15.7.3
   resolution: "@types/prop-types@npm:15.7.3"
@@ -14863,6 +14870,7 @@ fsevents@~2.3.1:
   resolution: "swift-graphql@workspace:."
   dependencies:
     "@types/marked": ^1.2.2
+    "@types/prettier": ^2.2.1
     husky: ^4.3.6
     marked: ^2.0.0
     prettier: ^2.2.1