diff --git a/package.json b/package.json
index d4d08d3..dee8ad6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@unleash/client-specification",
-  "version": "5.2.0",
+  "version": "5.2.1",
   "description": "A collection of test specifications to guide client implementations in various languages",
   "scripts": {
     "test": "node index",
diff --git a/schema/delta-event-schema.js b/schema/delta-event-schema.js
index e840181..41b0c85 100644
--- a/schema/delta-event-schema.js
+++ b/schema/delta-event-schema.js
@@ -18,6 +18,7 @@ const deltaEventSchema = Joi.alternatives().try(
         eventId: Joi.number().required(),
         type: Joi.string().valid("feature-removed").required(),
         featureName: Joi.string().required(),
+        project: Joi.string().required(),
     }),
     Joi.object({
         eventId: Joi.number().required(),
diff --git a/specifications/20-delta-api-events.json b/specifications/20-delta-api-events.json
index 24bdf46..1b4a663 100644
--- a/specifications/20-delta-api-events.json
+++ b/specifications/20-delta-api-events.json
@@ -43,7 +43,8 @@
             {
                 "eventId": 3,
                 "type": "feature-removed",
-                "featureName": "delta.api.events.updated.2"
+                "featureName": "delta.api.events.updated.2",
+                "project" : "default"
             },
             {
             "eventId": 4,