diff --git a/vwowrla.core/project.clj b/vwowrla.core/project.clj
index c1ad7e5..254220b 100644
--- a/vwowrla.core/project.clj
+++ b/vwowrla.core/project.clj
@@ -7,4 +7,7 @@
   :dependencies [[org.clojure/clojure "1.8.0"]
                  [org.clojure/tools.logging "0.3.1"]
                  [log4j "1.2.16"]
-                 [cheshire "5.5.0"]])
+                 [prismatic/schema "1.0.5"]
+                 [cheshire "5.5.0"]]
+
+  :profiles {:repl {:source-paths ["repl"]}})
diff --git a/vwowrla.core/repl/user.clj b/vwowrla.core/repl/user.clj
new file mode 100644
index 0000000..3df8000
--- /dev/null
+++ b/vwowrla.core/repl/user.clj
@@ -0,0 +1,5 @@
+(ns user
+  (:require
+    [schema.core :as s]))
+
+(s/set-fn-validation! true)