diff --git a/dadi/lib/help.js b/dadi/lib/help.js
index ae977827..ccbb83c5 100755
--- a/dadi/lib/help.js
+++ b/dadi/lib/help.js
@@ -17,8 +17,6 @@ const config = require(path.join(__dirname, '/../../config.js'))
 const Passport = require('@dadi/passport')
 const errorView = require(path.join(__dirname, '/view/errors'))
 
-var self = this
-
 module.exports.getVersion = function () {
   if (config.get('debug')) return version
 }
@@ -245,14 +243,6 @@ module.exports.clearCache = function (req, Cache, callback) {
     })
 }
 
-/**
- * Creates a URL/filename friendly version (slug) of any object that implements `toString()`
- * @param {Object} input - object to be slugified
- */
-module.exports.slugify = function (input) {
-  return require('underscore.string').slugify(input.toString())
-}
-
 /**
  * Generates a filename for a token wallet file
  * @param {String} host - Issuer host
@@ -260,13 +250,7 @@ module.exports.slugify = function (input) {
  * @param {String} clientId - Client ID
  */
 module.exports.generateTokenWalletFilename = function (host, port, clientId) {
-  return (
-    'token.' +
-    self.slugify(host + port) +
-    '.' +
-    self.slugify(clientId) +
-    '.json'
-  )
+  return `token.${host}${port}.${clientId}.json`
 }
 
 module.exports.getToken = function () {
diff --git a/package.json b/package.json
index 601f3028..bf4ecf27 100644
--- a/package.json
+++ b/package.json
@@ -83,7 +83,6 @@
     "snyk": "^1.47.0",
     "through": "~2.3.8",
     "toobusy-js": "~0.5.1",
-    "underscore.string": "~3.3.0",
     "wildcard": "~1.1.2"
   },
   "devDependencies": {