diff --git a/src/lib/addons/datadog-definition.ts b/src/lib/addons/datadog-definition.ts
index d2e0de5e0b..0c87aef376 100644
--- a/src/lib/addons/datadog-definition.ts
+++ b/src/lib/addons/datadog-definition.ts
@@ -12,6 +12,7 @@ import {
     FEATURE_STRATEGY_ADD,
     FEATURE_METADATA_UPDATED,
     FEATURE_PROJECT_CHANGE,
+    FEATURE_VARIANTS_UPDATED,
 } from '../types/events';
 import { IAddonDefinition } from '../types/model';
 
@@ -54,6 +55,7 @@ const dataDogDefinition: IAddonDefinition = {
         FEATURE_STRATEGY_ADD,
         FEATURE_METADATA_UPDATED,
         FEATURE_PROJECT_CHANGE,
+        FEATURE_VARIANTS_UPDATED,
     ],
     tagTypes: [
         {
diff --git a/src/lib/addons/feature-event-formatter-md.ts b/src/lib/addons/feature-event-formatter-md.ts
index d65c21fe9b..6f6ea8c4c1 100644
--- a/src/lib/addons/feature-event-formatter-md.ts
+++ b/src/lib/addons/feature-event-formatter-md.ts
@@ -13,6 +13,7 @@ import {
     FEATURE_METADATA_UPDATED,
     FEATURE_PROJECT_CHANGE,
     IEvent,
+    FEATURE_VARIANTS_UPDATED,
 } from '../types/events';
 
 export interface FeatureEventFormatter {
@@ -108,6 +109,8 @@ export class FeatureEventFormatterMd implements FeatureEventFormatter {
                 return 'created';
             case FEATURE_UPDATED:
                 return 'updated';
+            case FEATURE_VARIANTS_UPDATED:
+                return 'updated variants for';
             default:
                 return type;
         }
diff --git a/src/lib/addons/slack-definition.ts b/src/lib/addons/slack-definition.ts
index 198a466d40..03cacf4478 100644
--- a/src/lib/addons/slack-definition.ts
+++ b/src/lib/addons/slack-definition.ts
@@ -12,6 +12,7 @@ import {
     FEATURE_STRATEGY_ADD,
     FEATURE_METADATA_UPDATED,
     FEATURE_PROJECT_CHANGE,
+    FEATURE_VARIANTS_UPDATED,
 } from '../types/events';
 import { IAddonDefinition } from '../types/model';
 
@@ -71,6 +72,7 @@ const slackDefinition: IAddonDefinition = {
         FEATURE_STRATEGY_UPDATE,
         FEATURE_STRATEGY_ADD,
         FEATURE_METADATA_UPDATED,
+        FEATURE_VARIANTS_UPDATED,
         FEATURE_PROJECT_CHANGE,
     ],
     tagTypes: [
diff --git a/src/lib/addons/teams-definition.ts b/src/lib/addons/teams-definition.ts
index 388bd25b18..9bf97a2781 100644
--- a/src/lib/addons/teams-definition.ts
+++ b/src/lib/addons/teams-definition.ts
@@ -12,6 +12,7 @@ import {
     FEATURE_STRATEGY_ADD,
     FEATURE_METADATA_UPDATED,
     FEATURE_PROJECT_CHANGE,
+    FEATURE_VARIANTS_UPDATED,
 } from '../types/events';
 import { IAddonDefinition } from '../types/model';
 
@@ -42,6 +43,7 @@ const teamsDefinition: IAddonDefinition = {
         FEATURE_STRATEGY_UPDATE,
         FEATURE_STRATEGY_ADD,
         FEATURE_METADATA_UPDATED,
+        FEATURE_VARIANTS_UPDATED,
         FEATURE_PROJECT_CHANGE,
     ],
 };
diff --git a/src/lib/addons/webhook-definition.ts b/src/lib/addons/webhook-definition.ts
index 5786f4e0fb..5ef518f322 100644
--- a/src/lib/addons/webhook-definition.ts
+++ b/src/lib/addons/webhook-definition.ts
@@ -4,6 +4,7 @@ import {
     FEATURE_ENVIRONMENT_DISABLED,
     FEATURE_ENVIRONMENT_ENABLED,
     FEATURE_METADATA_UPDATED,
+    FEATURE_VARIANTS_UPDATED,
     FEATURE_PROJECT_CHANGE,
     FEATURE_REVIVED,
     FEATURE_STALE_OFF,
@@ -70,6 +71,7 @@ const webhookDefinition: IAddonDefinition = {
         FEATURE_STRATEGY_UPDATE,
         FEATURE_STRATEGY_ADD,
         FEATURE_METADATA_UPDATED,
+        FEATURE_VARIANTS_UPDATED,
         FEATURE_PROJECT_CHANGE,
     ],
 };
diff --git a/src/lib/types/events.ts b/src/lib/types/events.ts
index 04bf3edfa9..5f4e29b855 100644
--- a/src/lib/types/events.ts
+++ b/src/lib/types/events.ts
@@ -146,23 +146,23 @@ export class FeatureVariantEvent extends BaseEvent {
 
     readonly featureName: string;
 
-    readonly data: {
-        oldVariants: IVariant[];
-        newVariants: IVariant[];
-    };
+    readonly data: { variants: IVariant[] };
+
+    readonly preData: { variants: IVariant[] };
 
     constructor(p: {
         project: string;
         featureName: string;
         createdBy: string;
         tags: ITag[];
-        oldVariants: IVariant[];
         newVariants: IVariant[];
+        oldVariants: IVariant[];
     }) {
         super(FEATURE_VARIANTS_UPDATED, p.createdBy, p.tags);
         this.project = p.project;
         this.featureName = p.featureName;
-        this.data = { oldVariants: p.oldVariants, newVariants: p.newVariants };
+        this.data = { variants: p.newVariants };
+        this.preData = { variants: p.oldVariants };
     }
 }