diff --git a/.eslintrc.js b/.eslintrc.js
index 4253e17..0fba31a 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -12,7 +12,6 @@ module.exports = {
     'no-magic-numbers': 0,
     'no-param-reassign': 0,
     'fp/no-class': 0,
-    'fp/no-delete': 0,
     'fp/no-let': 0,
     'fp/no-loops': 0,
     'fp/no-mutating-assign': 0,
diff --git a/package-lock.json b/package-lock.json
index f678ad5..0145abc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5716,11 +5716,6 @@
         "to-regex-range": "^5.0.1"
       }
     },
-    "filter-obj": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/filter-obj/-/filter-obj-2.0.1.tgz",
-      "integrity": "sha512-yDEp513p7+iLdFHWBVdZFnRiOYwg8ZqmpaAiZCMjzqsbo7tCS4Qm4ulXOht337NGzkukKa9u3W4wqQ9tQPm3Ug=="
-    },
     "find-cache-dir": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/find-cache-dir/-/find-cache-dir-2.1.0.tgz",
@@ -7900,7 +7895,8 @@
     "lodash.get": {
       "version": "4.4.2",
       "resolved": "https://registry.npmjs.org/lodash.get/-/lodash.get-4.4.2.tgz",
-      "integrity": "sha1-LRd/ZS+jHpObRDjVNBSZ36OCXpk="
+      "integrity": "sha1-LRd/ZS+jHpObRDjVNBSZ36OCXpk=",
+      "dev": true
     },
     "lodash.isempty": {
       "version": "4.4.0",
@@ -7924,11 +7920,6 @@
       "integrity": "sha512-0KpjqXRVvrYyCsX1swR/XTK0va6VQkQM6MNo7PqW77ByjAhoARA8EfrP1N4+KlKj8YS0ZUCtRT/YUuhyYDujIQ==",
       "dev": true
     },
-    "lodash.set": {
-      "version": "4.3.2",
-      "resolved": "https://registry.npmjs.org/lodash.set/-/lodash.set-4.3.2.tgz",
-      "integrity": "sha1-2HV7HagH3eJIFrDWqEvqGnYjCyM="
-    },
     "lodash.transform": {
       "version": "4.6.0",
       "resolved": "https://registry.npmjs.org/lodash.transform/-/lodash.transform-4.6.0.tgz",
@@ -8959,6 +8950,11 @@
         "symbol-observable": "^1.0.4"
       }
     },
+    "omit.js": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/omit.js/-/omit.js-2.0.2.tgz",
+      "integrity": "sha512-hJmu9D+bNB40YpL9jYebQl4lsTW6yEHRTroJzNLqQJYHm7c+NQnJGfZmIWh8S3q3KoaxV1aLhV6B3+0N0/kyJg=="
+    },
     "once": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
diff --git a/package.json b/package.json
index 9d318d5..614e8e8 100644
--- a/package.json
+++ b/package.json
@@ -69,16 +69,14 @@
     "@netlify/zip-it-and-ship-it": "^1.3.12",
     "backoff": "^2.5.0",
     "clean-deep": "^3.3.0",
-    "filter-obj": "^2.0.1",
     "flush-write-stream": "^2.0.0",
     "folder-walker": "^3.2.0",
     "from2-array": "0.0.4",
     "hasha": "^5.0.0",
     "lodash.camelcase": "^4.3.0",
-    "lodash.get": "^4.4.2",
-    "lodash.set": "^4.3.2",
     "micro-api-client": "^3.3.0",
     "node-fetch": "^2.2.0",
+    "omit.js": "^2.0.2",
     "p-map": "^3.0.0",
     "p-wait-for": "^3.1.0",
     "parallel-transform": "^1.1.0",
diff --git a/src/index.js b/src/index.js
index 9ad83c6..14da497 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,6 +1,4 @@
 const dfn = require('@netlify/open-api')
-const get = require('lodash.get')
-const set = require('lodash.set')
 const pWaitFor = require('p-wait-for')
 
 const deploy = require('./deploy')
@@ -41,15 +39,24 @@ class NetlifyAPI {
   }
 
   get accessToken() {
-    return (get(this, 'defaultHeaders.Authorization') || '').replace('Bearer ', '') || null
+    const {
+      defaultHeaders: { Authorization },
+    } = this
+    if (typeof Authorization !== 'string' || !Authorization.startsWith('Bearer ')) {
+      return null
+    }
+
+    return Authorization.replace('Bearer ', '')
   }
 
   set accessToken(token) {
-    if (token) {
-      set(this, 'defaultHeaders.Authorization', `Bearer ${token}`)
-    } else {
+    if (!token) {
+      // eslint-disable-next-line fp/no-delete
       delete this.defaultHeaders.Authorization
+      return
     }
+
+    this.defaultHeaders.Authorization = `Bearer ${token}`
   }
 
   get basePath() {
diff --git a/src/methods/response.js b/src/methods/response.js
index b807ba3..37b2020 100644
--- a/src/methods/response.js
+++ b/src/methods/response.js
@@ -1,4 +1,5 @@
 const { JSONHTTPError, TextHTTPError } = require('micro-api-client')
+const omit = require('omit.js').default
 
 // Read and parse the HTTP response
 const parseResponse = async function (response) {
@@ -38,8 +39,7 @@ const parseJsonResponse = function (response, textResponse, responseType) {
 }
 
 const getFetchError = function (error, url, opts) {
-  const data = { ...opts }
-  delete data.Authorization
+  const data = omit(opts, ['Authorization'])
   Object.assign(error, { name: 'FetchError', url, data })
   return error
 }
diff --git a/src/operations.js b/src/operations.js
index cd9a22b..8800244 100644
--- a/src/operations.js
+++ b/src/operations.js
@@ -1,6 +1,5 @@
 const { paths } = require('@netlify/open-api')
-
-const { omit } = require('./utils/omit')
+const omit = require('omit.js').default
 
 // Retrieve all OpenAPI operations
 const getOperations = function () {
diff --git a/src/utils/omit.js b/src/utils/omit.js
deleted file mode 100644
index dc3ad99..0000000
--- a/src/utils/omit.js
+++ /dev/null
@@ -1,8 +0,0 @@
-const filterObj = require('filter-obj')
-
-// lodash.omit is 1400 lines of codes. filter-obj is much smaller and simpler.
-const omit = function (obj, keys) {
-  return filterObj(obj, (key) => !keys.includes(key))
-}
-
-module.exports = { omit }