diff --git a/README.md b/README.md
index c2a03d52f6110833a36dea8ae304b4b788d90f48..6960d28241dd068edde33a6f27eab1fe02de1a92 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,4 @@
-# pi calculation benchmark
-[http://fab.cba.mit.edu/classes/MAS.864/text/benchmark.pdf](http://fab.cba.mit.edu/classes/864.17/text/benchmark.pdf)
+# [pi calculation benchmark](pi.pdf)
 
 |estimated GFlops|code|description|system|date|
 |---|---|---|---|---|
diff --git a/pi.pdf b/pi.pdf
new file mode 100644
index 0000000000000000000000000000000000000000..7c792f001d21483b01a49c7e889f3aa245969a60
Binary files /dev/null and b/pi.pdf differ