diff --git a/challenges/intermediate-ziplines.json b/challenges/intermediate-ziplines.json
index 2a2d5af952..4839ec8760 100644
--- a/challenges/intermediate-ziplines.json
+++ b/challenges/intermediate-ziplines.json
@@ -140,7 +140,7 @@
       "difficulty": 1.07,
       "challengeSeed": ["126415123"],
       "description": [
-        "<span class='text-info'>Objective:</span> Build a <a href='http://codepen.io' target='_blank'>CodePen.io</a> app that successfully reverse-engineers this: <a href='' target='_blank'>http://codepen.io/dting/full/KpJXZV/</a>.",
+        "<span class='text-info'>Objective:</span> Build a <a href='http://codepen.io' target='_blank'>CodePen.io</a> app that successfully reverse-engineers this: <a href='http://codepen.io/dting/full/KpJXZV/' target='_blank'>http://codepen.io/dting/full/KpJXZV/</a>.",
         "<span class='text-info'>Rule #1:</span> Don't look at the example project's code on CodePen. Figure it out for yourself.",
         "<span class='text-info'>Rule #2:</span> You may use whichever libraries or APIs you need.",
         "<span class='text-info'>Rule #3:</span> Reverse engineer the example project's functionality, and also feel free to personalize it.",