diff --git a/package.json b/package.json
index 6d6f6a9..1121d68 100644
--- a/package.json
+++ b/package.json
@@ -5,36 +5,36 @@
     "url": "http://gajus.com"
   },
   "dependencies": {
-    "ajv": "^6.9.1",
-    "lodash": "^4.17.11",
+    "ajv": "^6.10.2",
+    "lodash": "^4.17.14",
     "slice-ansi": "^2.1.0",
-    "string-width": "^3.0.0"
+    "string-width": "^4.1.0"
   },
   "description": "Formats data into a string table.",
   "devDependencies": {
-    "@babel/cli": "^7.2.3",
-    "@babel/core": "^7.2.2",
-    "@babel/node": "^7.2.2",
-    "@babel/plugin-transform-flow-strip-types": "^7.2.3",
-    "@babel/preset-env": "^7.3.1",
-    "@babel/register": "^7.0.0",
+    "@babel/cli": "^7.5.0",
+    "@babel/core": "^7.5.4",
+    "@babel/node": "^7.5.0",
+    "@babel/plugin-transform-flow-strip-types": "^7.4.4",
+    "@babel/preset-env": "^7.5.4",
+    "@babel/register": "^7.4.4",
     "ajv-cli": "^3.0.0",
-    "ajv-keywords": "^3.4.0",
-    "babel-plugin-istanbul": "^5.1.0",
+    "ajv-keywords": "^3.4.1",
+    "babel-plugin-istanbul": "^5.1.4",
     "babel-plugin-transform-export-default-name": "^2.0.4",
     "chai": "^4.2.0",
     "chalk": "^2.4.2",
-    "coveralls": "^3.0.2",
-    "eslint": "^5.13.0",
-    "eslint-config-canonical": "^16.1.0",
-    "flow-bin": "^0.92.1",
-    "flow-copy-source": "^2.0.2",
-    "gitdown": "^2.5.7",
-    "husky": "^1.3.1",
-    "mocha": "^5.2.0",
-    "nyc": "^13.2.0",
-    "semantic-release": "^15.13.3",
-    "sinon": "^7.2.3"
+    "coveralls": "^3.0.5",
+    "eslint": "^6.0.1",
+    "eslint-config-canonical": "^17.1.4",
+    "flow-bin": "^0.102.0",
+    "flow-copy-source": "^2.0.7",
+    "gitdown": "^3.1.1",
+    "husky": "^3.0.0",
+    "mocha": "^6.1.4",
+    "nyc": "^14.1.1",
+    "semantic-release": "^15.13.18",
+    "sinon": "^7.3.2"
   },
   "engines": {
     "node": ">=6.0.0"
diff --git a/src/alignString.js b/src/alignString.js
index 16936a4..f0383ff 100644
--- a/src/alignString.js
+++ b/src/alignString.js
@@ -74,7 +74,7 @@ export default (subject, containerWidth, alignment) => {
     throw new TypeError('Alignment parameter value must be a string.');
   }
 
-  if (alignments.indexOf(alignment) === -1) {
+  if (!alignments.includes(alignment)) {
     throw new Error('Alignment parameter value must be a known alignment parameter value (left, right, center).');
   }