diff --git a/package.json b/package.json
index 1b70044d..d2cf072c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "hawk.api",
-  "version": "1.1.18",
+  "version": "1.1.19",
   "main": "index.ts",
   "license": "UNLICENSED",
   "scripts": {
diff --git a/src/typeDefs/event.ts b/src/typeDefs/event.ts
index 8d609a52..1881c27e 100644
--- a/src/typeDefs/event.ts
+++ b/src/typeDefs/event.ts
@@ -247,7 +247,7 @@ type RepetitionPayload {
 }
 
 """
-Event's repetitions. Make Event unique by repetition's payload
+Repetition of the event
 """
 type Repetition {
   """
@@ -263,7 +263,12 @@ type Repetition {
   """
   Event's payload patch
   """
-  payload: RepetitionPayload!
+  payload: RepetitionPayload
+
+  """
+  Delta of the event's payload, stringified JSON
+  """
+  delta: String
 }
 
 """