diff --git a/re/src/re/service/timeout.clj b/re/src/re/service/timeout.clj
index 857c885..ac42294 100644
--- a/re/src/re/service/timeout.clj
+++ b/re/src/re/service/timeout.clj
@@ -76,7 +76,7 @@
       (reify Serializer
         (configure [_ _ _] nil)
         (serialize [_ _ map]
-          (.getBytes (str map)))
+          (.getBytes (pr-str map)))
         (close [_] nil)))
     (deserializer [_]
       (reify Deserializer