diff --git a/README.md b/README.md
index 7ad0103..ceb82e7 100644
--- a/README.md
+++ b/README.md
@@ -6,4 +6,8 @@ To run, please type
 
     python run_sharppy.py XXX
 
-where XXX is the 3 letter identifier of the US Sounding site you wish to view. This script will plot the current sounding using data from the Storm Prediction Center's website.
\ No newline at end of file
+where XXX is the 3 letter identifier of the US Sounding site you wish to view. This script will plot the current sounding using data from the Storm Prediction Center's website.
+
+Requirements
+============
+SHARPpy requires the Python numpy and TKinter packages.