diff --git a/samples/README.md b/samples/README.md
index 1de29db..79a7103 100644
--- a/samples/README.md
+++ b/samples/README.md
@@ -1,3 +1,3 @@
 Following is a rendering of various versions of Wikipedia article "AMD64". The particular article was chosen because it contains good mixture of English and numbers.
 
-![Sample AMD64](https://github.com/minjaesong/Terrarum-sans-bitmap/blob/master/samples/wikipedia_amd64.PNG) 
\ No newline at end of file
+![Sample AMD64](https://github.com/minjaesong/Terrarum-sans-bitmap/blob/master/samples/wikipedia_amd64.png)