diff --git a/README.md b/README.md
index 94c2869b..3a49cd9f 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 <div align="center">
-  <img src="https://cdn.rawgit.com/yangshun/tech-interview-handbook/master/assets/book.svg" alt="Tech Interview Handbook" width="300">
+  <img src="https://cdn.rawgit.com/yangshun/tech-interview-handbook/master/assets/book.svg" alt="Tech Interview Handbook" width="400">
 </div>
 
 # Tech Interview Handbook