diff --git a/rails-to-caveman.asd b/rails-to-caveman.asd
index 2afaf00..8c73239 100644
--- a/rails-to-caveman.asd
+++ b/rails-to-caveman.asd
@@ -1,9 +1,10 @@
 (defsystem "rails-to-caveman"
   :version "0.1.0"
   :author "Craig Oates"
-  :license ""
+  :license "MIT"
   :depends-on ("clack"
                "lack"
+	       "clack-errors" ; <--- Added in Chapter 1.
                "caveman2"
                "envy"
                "cl-ppcre"
@@ -17,7 +18,8 @@
 
                ;; for DB
                "datafly"
-               "sxql")
+               "sxql"
+	       "mito" ; <--- Added in Chapter 4.
   :components ((:module "src"
                 :components
                 ((:file "main" :depends-on ("config" "view" "db"))