diff --git a/.travis.yml b/.travis.yml
index b18021a..b8704d5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,7 +17,7 @@ env:
   matrix:
     - SEQUELIZE_VERSION=4.*
     - SEQUELIZE_VERSION=5.*
-    - SEQUELIZE_VERSION=next
+    - SEQUELIZE_VERSION=6.*
 
   global:
     - TEST=1
diff --git a/lib/utils/lodash-natives.js b/lib/utils/lodash-natives.js
index dac8ea0..7ffb045 100644
--- a/lib/utils/lodash-natives.js
+++ b/lib/utils/lodash-natives.js
@@ -10,7 +10,8 @@
 /* eslint-disable func-names */
 /* eslint-disable no-prototype-builtins */
 /* eslint-disable no-param-reassign */
-/* eslint-disable unicorn/prevent-abbreviations  */
+/* eslint-disable unicorn/prevent-abbreviations */
+/* eslint-disable unicorn/no-reduce */
 
 const capitalize = function (string) {
   if (typeof string !== 'string') {
diff --git a/lib/utils/type-checks.js b/lib/utils/type-checks.js
index f9c9074..f3bb549 100644
--- a/lib/utils/type-checks.js
+++ b/lib/utils/type-checks.js
@@ -30,7 +30,7 @@ function checkType(name, value, type, errorPrefix) {
  * @returns {bool}
  * @throws {TypeError}
  */
-const checkTypeOptional = function (name, value, type) {
+const checkTypeOptional = function check(name, value, type) {
   if (value === null) {
     return true;
   }
@@ -47,7 +47,7 @@ const checkTypeOptional = function (name, value, type) {
  * @returns {bool}
  * @throws {TypeError}
  */
-const checkTypeRequired = function (name, value, type) {
+const checkTypeRequired = function check(name, value, type) {
   if (value === null) {
     throw new TypeError(`Required configuration setting '${name}' is missing`);
   }
diff --git a/package.json b/package.json
index fed7043..3b776be 100644
--- a/package.json
+++ b/package.json
@@ -48,33 +48,33 @@
     "oasv3"
   ],
   "devDependencies": {
-    "@release-it/conventional-changelog": "^1.1.4",
-    "acorn": "^7.2.0",
-    "ajv": "^6.12.2",
-    "codecov": "^3.6.5",
+    "@release-it/conventional-changelog": "^2.0.0",
+    "acorn": "^8.0.0",
+    "ajv": "^6.12.5",
+    "codecov": "^3.7.2",
     "cross-env": "^7.0.2",
-    "del-cli": "^3.0.0",
-    "eslint": "^7.0.0",
-    "eslint-config-airbnb-base": "^14.1.0",
-    "eslint-config-prettier": "^6.11.0",
-    "eslint-plugin-import": "^2.20.2",
-    "eslint-plugin-jest": "^23.10.0",
-    "eslint-plugin-jsdoc": "^25.0.0",
-    "eslint-plugin-prettier": "^3.1.3",
-    "eslint-plugin-unicorn": "^19.0.0",
+    "del-cli": "^3.0.1",
+    "eslint": "^7.10.0",
+    "eslint-config-airbnb-base": "^14.2.0",
+    "eslint-config-prettier": "^6.12.0",
+    "eslint-plugin-import": "^2.22.1",
+    "eslint-plugin-jest": "^24.0.0",
+    "eslint-plugin-jsdoc": "^30.0.0",
+    "eslint-plugin-prettier": "^3.1.4",
+    "eslint-plugin-unicorn": "^22.0.0",
     "fs": "0.0.1-security",
-    "husky": "^4.2.5",
+    "husky": "^4.3.0",
     "jest": "^25.0.0",
-    "jsdoc": "^3.6.4",
-    "lint-staged": "^10.2.2",
+    "jsdoc": "^3.6.6",
+    "lint-staged": "^10.4.0",
     "lodash.clonedeep": "^4.5.0",
-    "moment": "^2.25.3",
-    "mysql2": "^2.1.0",
+    "moment": "^2.29.0",
+    "mysql2": "^2.2.5",
     "npm-run-all": "^4.1.3",
-    "prettier": "^2.0.0",
-    "release-it": "^13.0.0",
-    "sequelize": "^5.21.8",
-    "swagger-parser": "^9.0.0"
+    "prettier": "^2.1.2",
+    "release-it": "^14.0.0",
+    "sequelize": "^6.0.0",
+    "swagger-parser": "^10.0.0"
   },
   "esdoc": {
     "source": "./src",
diff --git a/test/strategies/openapi-v3-validation-wrapper.js b/test/strategies/openapi-v3-validation-wrapper.js
index 82350ca..8ca8bda 100644
--- a/test/strategies/openapi-v3-validation-wrapper.js
+++ b/test/strategies/openapi-v3-validation-wrapper.js
@@ -17,7 +17,7 @@ module.exports = Object.freeze({
       get: {
         parameters: [],
         responses: {
-          '404': {
+          404: {
             description: 'not found',
           },
         },