diff --git a/README.md b/README.md
index 04aed9343..b86f90abf 100644
--- a/README.md
+++ b/README.md
@@ -251,7 +251,7 @@ with their data.
   There is a set of notes that describe the background and details of the
   algorithms that pyro implements:
 
-  http://bender.astro.sunysb.edu/hydro_by_example/CompHydroTutorial.pdf
+  http://open-astrophysics-bookshelf.github.io/numerical_exercises/
 
   The source for these notes is also available on github: