diff --git a/src/modules/codePreviews.js b/src/modules/codePreviews.js
index 278ba68..0a21026 100644
--- a/src/modules/codePreviews.js
+++ b/src/modules/codePreviews.js
@@ -37,7 +37,7 @@ async function processFile(link) {
   let entireFile = false;
 
   if (lineStr) {
-    const [start, end] = link.match(/\d+/g);
+    const [start, end] = lineStr.match(/\d+/g);
     if (!end) {
       startLine = endLine = start;
     } else {