diff --git a/README.md b/README.md
index 82f5f8b..8542dcb 100644
--- a/README.md
+++ b/README.md
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   - [First Edition](./books/system%20design/Designing%20Data%20Intensive%20Applications.pdf)
 - [_Designing Distributed Systems_](<./books/system%20design/Designing%20Distributed%20Systems,%202nd%20Edition%20Patterns%20and%20Paradigms%20for%20Scalable,%20Reliable%20Systems%20Using%20Kubernetes%20(Brendan%20Burns)%20(Z-Library).pdf>)
 - [_Designing Event-Driven Systems_](./books/system%20design/Designing-Event-Driven-Systems.pdf)
-- [_Grokking the Advanced System Design Interview_](<./books/system%20design/Grokking%20the%20Advanced%20System%20Design%20Interview%20(educative.io)%20(Z-Library).pdf>)
-- [_Grokking the System Design Interview_](<./books/system%20design/Grokking%20the%20System%20Design%20Interview%20(Educative.io)%20(Z-Library).pdf>)
+- [_Grokking the Advanced System Design Interview_](<./books/system%20design/Grokking%20the%20Advanced%20System%20Design%20Interview%20(designgurus.io)%20(Z-Library).pdf>)
+- [_Grokking the System Design Interview_](<./books/system%20design/Grokking%20the%20System%20Design%20Interview%20(designgurus.io)%20(Z-Library).pdf>)
 - _System Design Interview: An Insider's Guide_
   - [Second Edition](./books/system%20design/pdfcoffee.com_system-design-interview-an-insiders-guidepdf-pdf-free.pdf)
   - [Volume 2](./books/system%20design/pdfcoffee.com_system-design-interview-an-insiders-guide-volume-2-1736049119-9781736049112-compress-pdf-free.pdf)
diff --git a/books/system design/Grokking the Advanced System Design Interview (educative.io) (Z-Library).pdf b/books/system design/Grokking the Advanced System Design Interview (designgurus.io) (Z-Library).pdf
similarity index 100%
rename from books/system design/Grokking the Advanced System Design Interview (educative.io) (Z-Library).pdf
rename to books/system design/Grokking the Advanced System Design Interview (designgurus.io) (Z-Library).pdf
diff --git a/books/system design/Grokking the System Design Interview (Educative.io) (Z-Library).pdf b/books/system design/Grokking the System Design Interview (designgurus.io) (Z-Library).pdf
similarity index 100%
rename from books/system design/Grokking the System Design Interview (Educative.io) (Z-Library).pdf
rename to books/system design/Grokking the System Design Interview (designgurus.io) (Z-Library).pdf