diff --git a/src/utilities/FilterUtil.js b/src/utilities/FilterUtil.js
index d8ec252..e055969 100644
--- a/src/utilities/FilterUtil.js
+++ b/src/utilities/FilterUtil.js
@@ -211,7 +211,7 @@ module.exports = class FilterUtility {
                 i--;
             }
 
-            if (this.REGEX.link.test(words[i])) continue;
+            if (this.REGEX.link.test(words[i]) || !words[i]) continue;
 
             const letters = words[i].split('');
             for (let j = 1; j < letters.length - 1; j++) {