diff --git a/README.md b/README.md
index 573aa52..5625a1f 100644
--- a/README.md
+++ b/README.md
@@ -4,10 +4,25 @@
 
 ## Installation
 
-### Requirements
-* bash 4+ (OSX: `brew install bash`)
-* GNU sed (OSX: `brew install gnu-sed --with-default-names`)
-* GNU getopt (OSX: `brew install gnu-getopt --with-default-names`)
+### Dependencies
+
+#### Required
+
+* bash 4+
+
+  * Install on OSX: `brew install bash`
+
+#### Recommended
+
+* GNU sed
+
+  * Avoids creation of `.bak` files in strange places on OSX
+  * Install on OSX: `brew install gnu-sed --with-default-names`
+
+* GNU getopt
+
+  * Required to use long named switches, like --version or --help instead of -v and -h.
+  * Install on OSX: `brew install gnu-getopt --with-default-names`
 
 ### Install