diff --git a/project.clj b/project.clj
index 49ca66a..d06cf1c 100644
--- a/project.clj
+++ b/project.clj
@@ -15,5 +15,6 @@
   :uberjar-name "clojsa-standalone.jar"
   :profiles
   {:dev {:dependencies [[javax.servlet/servlet-api "2.5"]
-                        [ring/ring-mock "0.3.2"]]}
+                        [ring/ring-mock "0.3.2"]
+                        [postmortem "0.4.0"]]}
    :production {:env {:production true}}})