diff --git a/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/core.cljc b/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/core.cljc
index 354d2a2..5485fbc 100644
--- a/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/core.cljc
+++ b/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/core.cljc
@@ -2,4 +2,13 @@
   (:require [clojure.spec.alpha :as s]
             [orchestra.core :refer [defn-spec]]
             [org.domaindrivenarchitecture.activity-pub-poc.spec-helper :as sh]
-            [org.domaindrivenarchitecture.activity-pub-poc.activitystreams2 :as as]))
+            [org.domaindrivenarchitecture.activity-pub-poc.activitystreams2 :as as]
+            [clojure.data.json :as json]))
+
+(defn serialize
+  [as-map]
+  (json/write-str
+   (assoc
+    as-map
+    (keyword "@context")
+    "https://www.w3.org/ns/activitystreams")))
\ No newline at end of file
diff --git a/src/test/cljc/org/domaindrivenarchitecture/activity_pub_poc/core_test.cljc b/src/test/cljc/org/domaindrivenarchitecture/activity_pub_poc/core_test.cljc
index 7160d1b..69275b2 100644
--- a/src/test/cljc/org/domaindrivenarchitecture/activity_pub_poc/core_test.cljc
+++ b/src/test/cljc/org/domaindrivenarchitecture/activity_pub_poc/core_test.cljc
@@ -2,22 +2,20 @@
   (:require
    [clojure.test :refer [deftest is are testing run-tests]]
    [clojure.spec.alpha :as s]
+   [clojure.string :as str]
    [org.domaindrivenarchitecture.activity-pub-poc.core :as sut]))
 
 (deftest should-serailize
-  (is (= "{
- \"@context\": \"https://www.w3.org/ns/activitystreams\", 
- \"summary\": \"Sally liked a note\",
- \"type\": \"Like\",
- \"actor\": {
-  \"type\": \"Person\",
-  \"name\": \"Sally\"
- },
- \"object\": \"http://example.org/notes/1\"
-}"
-         (sut/serialize 
-          {:summary "Sally liked a note",
-           :type "Like",
-           :actor {:type "Person",
-                   :name "Sally"},
-           :object "http://example.org/notes/1"}))))
\ No newline at end of file
+  (is (=  (str "{\"@context\": \"https://www.w3.org/ns/activitystreams\", "
+               "\"summary\": \"Sally liked a note\", "
+               "\"type\": \"Like\", "
+               "\"actor\": {"
+               "\"type\": \"Person\", "
+               "\"name\": \"Sally\"}, "
+               "\"object\": \"http://example.org/notes/1\"}")
+          (sut/serialize
+           {:summary "Sally liked a note",
+            :type "Like",
+            :actor {:type "Person",
+                    :name "Sally"},
+            :object "http://example.org/notes/1"}))))
\ No newline at end of file