diff --git a/lib/badwords.js b/lib/badwords.js
index 4da86ad..a02d0d4 100644
--- a/lib/badwords.js
+++ b/lib/badwords.js
@@ -66,7 +66,7 @@ class Filter {
     this.list.push(...words);
 
     words.forEach((word) => {
-      if (!!~this.exclude.indexOf(word)) {
+      if (this.exclude.includes(word)) {
         this.exclude.splice(this.exclude.indexOf(word), 1);
       }
     });