diff --git a/docs/lectures/chapter-01.md b/docs/lectures/chapter-01.md
index 671aadd4..3daaa1a2 100644
--- a/docs/lectures/chapter-01.md
+++ b/docs/lectures/chapter-01.md
@@ -12,11 +12,11 @@ outline : deep
 
 
 
-<iframe src="/Python-Programming/public/lectures/chapter-01.pdf" width="100%" height="400" allowfullscreen></iframe>
+<iframe src="./chapter-01.pdf" width="100%" height="400" allowfullscreen></iframe>
 
 <br>
 
-<a href="/Python-Programming/public/lectures/chapter-01.pdf" target="_blank" rel="noopener">
+<a href="./chapter-01.pdf" target="_blank" rel="noopener">
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