diff --git a/package.json b/package.json
index 8eef7aba44..bc5ae5f4c0 100644
--- a/package.json
+++ b/package.json
@@ -107,6 +107,7 @@
     "@types/uuid": "^3.4.0",
     "@types/winston": "^2.2.0",
     "prettier": "~1.7.0",
+    "@types/xml2js": "^0.4.0",
     "tslint-config-prettier": "^1.1.0",
     "tslint-react": "~3.0.0"
   }
diff --git a/script/generate-octicons b/script/generate-octicons.ts
similarity index 79%
rename from script/generate-octicons
rename to script/generate-octicons.ts
index fa09963ae7..93eff61bd5 100644
--- a/script/generate-octicons
+++ b/script/generate-octicons.ts
@@ -1,5 +1,3 @@
-#!/usr/bin/env node
-
 /* generate-octicons
  *
  * Utility script for generating a strongly typed representation of all
@@ -9,11 +7,11 @@
 
 'use strict'
 
-const fs = require('fs')
-const process = require('process')
-const xml2js = require('xml2js')
-const path = require('path')
-const toCamelCase = require('to-camel-case')
+import fs = require('fs')
+import process = require('process')
+import xml2js = require('xml2js')
+import path = require('path')
+import toCamelCase = require('to-camel-case')
 
 const filePath = path.resolve(
   __dirname,
@@ -26,7 +24,16 @@ const filePath = path.resolve(
 
 const file = fs.readFileSync(filePath)
 
-xml2js.parseString(file, function(err, result) {
+interface XML2JSResult {
+  svg: { symbol: ReadonlyArray<XML2JSNode> }
+}
+interface XML2JSNode {
+  $: { [key: string]: string }
+  path: ReadonlyArray<XML2JSNode>
+
+}
+
+xml2js.parseString(file, function(err, result: XML2JSResult) {
   const viewBoxRe = /0 0 (\d+) (\d+)/
   const out = fs.createWriteStream(
     path.resolve(__dirname, '../app/src/ui/octicons/octicons.generated.ts')