diff --git a/lib/load-release-rules.js b/lib/load-release-rules.js
index 30497f6f..508b0349 100644
--- a/lib/load-release-rules.js
+++ b/lib/load-release-rules.js
@@ -31,7 +31,7 @@ module.exports = ({releaseRules}, {cwd}) => {
     loadedReleaseRules.forEach(rule => {
       if (!rule || isUndefined(rule.release)) {
         throw new Error('Error in commit-analyzer configuration: rules must be an object with a "release" property');
-      } else if (RELEASE_TYPES.indexOf(rule.release) === -1 && rule.release !== null && rule.release !== false) {
+      } else if (!RELEASE_TYPES.includes(rule.release) && rule.release !== null && rule.release !== false) {
         throw new Error(
           `Error in commit-analyzer configuration: "${
             rule.release
diff --git a/package.json b/package.json
index 74f513f5..fc99d3a9 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "nyc": "^14.0.0",
     "semantic-release": "^16.0.0-beta",
     "sinon": "^7.1.1",
-    "xo": "^0.24.0"
+    "xo": "^0.25.0"
   },
   "engines": {
     "node": ">=8.3"