diff --git a/src/propeller/problems/PSB2/shopping_list.cljc b/src/propeller/problems/PSB2/shopping_list.cljc
index d8e6aa6..9578cad 100644
--- a/src/propeller/problems/PSB2/shopping_list.cljc
+++ b/src/propeller/problems/PSB2/shopping_list.cljc
@@ -77,7 +77,9 @@ Source: https://arxiv.org/pdf/2106.06086.pdf"
                       :cljs (apply + errors)))))
 
 (defn -main
-  "Runs propel-gp, giving it a map of arguments."
+  "Runs the top-level genetic programming function, giving it a map of 
+  arguments with defaults that can be overridden from the command line
+  or through a passed map."
   [& args]
   (gp/gp
     (merge