diff --git a/guide/english/certifications/javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/binary-agents/index.md b/guide/english/certifications/javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/binary-agents/index.md
index 4884c2f347..b94635d9e0 100644
--- a/guide/english/certifications/javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/binary-agents/index.md
+++ b/guide/english/certifications/javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/binary-agents/index.md
@@ -71,7 +71,7 @@ Make sure that each time you transcode a character from binary to decimal, you r
 ## Relevant Links
 
 *   <a href='http://forum.freecodecamp.com/t/javascript-string-prototype-split/15944' target='_blank' rel='nofollow'>String.prototype.split</a>
-*   <a href='http://forum.freecodecamp.com/t/javascript-parseint/14686' target='_blank' rel='nofollow'>parseInt</a>
+*   <a href='https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/parseInt' target='_blank' rel='nofollow'>parseInt</a>
 
 ## ![:sunflower:](https://forum.freecodecamp.com/images/emoji/emoji_one/sunflower.png?v=3 ":sunflower:") Intermediate Code Solution:
 ```javascript
@@ -122,8 +122,7 @@ Make sure that each time you transcode a character from binary to decimal, you r
 ## Relevant Links
 
 *   <a href='http://forum.freecodecamp.com/t/javascript-math-pow/14685' target='_blank' rel='nofollow'>Math.pow</a>
-*   <a>String.length</a>
-*   <a href='http://example.com' target='_blank' rel='nofollow'>Link Title 3</a>
+*   <a href='https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/length' target='_blank' rel='nofollow'>String.length</a>
 
 ## ![:rotating_light:](https://forum.freecodecamp.com/images/emoji/emoji_one/rotating_light.png?v=3 ":rotating_light:") Advanced Code Solution:
 ```javascript