diff --git a/README.md b/README.md
index f2fb2f1..e3ac0fb 100644
--- a/README.md
+++ b/README.md
@@ -37,7 +37,7 @@ real request).
 
 ##Installation
 
-I finally uploaded VCR.py to pypi!  So you can just `pip install vcrpy`
+I finally uploaded VCR.py to pypi!  So you can just `pip install vcrpy` (first you may need to `brew install libyaml` [[Homebrew](http://mxcl.github.com/homebrew/)])
 
 ##Ruby VCR compatibility
 I'm not trying to match the format of the YAML files.  Cassettes generated by