diff --git a/src/lib/routes/admin-api/project/environments.ts b/src/lib/routes/admin-api/project/environments.ts
index 03f4026297..e5cec10793 100644
--- a/src/lib/routes/admin-api/project/environments.ts
+++ b/src/lib/routes/admin-api/project/environments.ts
@@ -102,7 +102,7 @@ export default class EnvironmentsController extends Controller {
         this.route({
             method: 'post',
             path: `${PREFIX}/:environment/default-strategy`,
-            handler: this.addDefaultStrategyToProjectEnvironment,
+            handler: this.updateDefaultStrategyForProjectEnvironment,
             permission: UPDATE_PROJECT,
             middleware: [
                 openApiService.validPath({
@@ -110,7 +110,7 @@ export default class EnvironmentsController extends Controller {
                     operationId: 'addDefaultStrategyToProjectEnvironment',
                     summary: 'Set environment-default strategy',
                     description:
-                        'Adds a default strategy for this environment. Unleash will use this strategy by default when enabling a toggle. Use the wild card "*" for `:environment` to add to all environments. ',
+                        'Sets a default strategy for this environment. Unleash will use this strategy by default when enabling a toggle. Use the wild card "*" for `:environment` to add to all environments. ',
                     requestBody: createRequestSchema(
                         'createFeatureStrategySchema',
                     ),
@@ -161,14 +161,14 @@ export default class EnvironmentsController extends Controller {
         res.status(200).end();
     }
 
-    async addDefaultStrategyToProjectEnvironment(
+    async updateDefaultStrategyForProjectEnvironment(
         req: Request<IProjectEnvironmentParams, CreateFeatureStrategySchema>,
         res: Response<CreateFeatureStrategySchema>,
     ): Promise<void> {
         const { projectId, environment } = req.params;
         const strategy = req.body;
 
-        const saved = await this.environmentService.addDefaultStrategy(
+        const saved = await this.environmentService.updateDefaultStrategy(
             environment,
             projectId,
             strategy,
diff --git a/src/lib/services/environment-service.ts b/src/lib/services/environment-service.ts
index 4e9360b0a2..303c954e9b 100644
--- a/src/lib/services/environment-service.ts
+++ b/src/lib/services/environment-service.ts
@@ -1,4 +1,5 @@
 import {
+    DEFAULT_STRATEGY_UPDATED,
     IEnvironment,
     IEnvironmentStore,
     IFeatureEnvironmentStore,
@@ -126,21 +127,34 @@ export default class EnvironmentService {
         }
     }
 
-    async addDefaultStrategy(
+    async updateDefaultStrategy(
         environment: string,
         projectId: string,
         strategy: CreateFeatureStrategySchema,
+        username: string = 'unknown',
     ): Promise<CreateFeatureStrategySchema> {
         if (strategy.name !== 'flexibleRollout') {
             throw new BadDataError(
                 'Only "flexibleRollout" strategy can be used as a default strategy for an environment',
             );
         }
-        return this.projectStore.updateDefaultStrategy(
+        const previousDefaultStrategy =
+            await this.projectStore.getDefaultStrategy(projectId, environment);
+        const defaultStrategy = await this.projectStore.updateDefaultStrategy(
             projectId,
             environment,
             strategy,
         );
+        await this.eventService.storeEvent({
+            type: DEFAULT_STRATEGY_UPDATED,
+            project: projectId,
+            environment,
+            createdBy: username,
+            preData: previousDefaultStrategy,
+            data: defaultStrategy,
+        });
+
+        return defaultStrategy;
     }
 
     async overrideEnabledProjects(
diff --git a/src/lib/types/events.ts b/src/lib/types/events.ts
index 841a69b9c1..f37f27b0bb 100644
--- a/src/lib/types/events.ts
+++ b/src/lib/types/events.ts
@@ -111,6 +111,7 @@ export const SETTING_DELETED = 'setting-deleted' as const;
 export const PROJECT_ENVIRONMENT_ADDED = 'project-environment-added' as const;
 export const PROJECT_ENVIRONMENT_REMOVED =
     'project-environment-removed' as const;
+export const DEFAULT_STRATEGY_UPDATED = 'default-strategy-updated' as const;
 
 export const CLIENT_METRICS = 'client-metrics' as const;
 export const CLIENT_REGISTER = 'client-register' as const;
@@ -297,6 +298,7 @@ export const IEventTypes = [
     BANNER_DELETED,
     PROJECT_ENVIRONMENT_ADDED,
     PROJECT_ENVIRONMENT_REMOVED,
+    DEFAULT_STRATEGY_UPDATED,
 ] as const;
 export type IEventType = (typeof IEventTypes)[number];
 
diff --git a/src/test/e2e/api/admin/project/environments.e2e.test.ts b/src/test/e2e/api/admin/project/environments.e2e.test.ts
index 12ab09cd97..5d2b2cd43d 100644
--- a/src/test/e2e/api/admin/project/environments.e2e.test.ts
+++ b/src/test/e2e/api/admin/project/environments.e2e.test.ts
@@ -113,19 +113,21 @@ test('Should not remove environment from project if project only has one environ
 });
 
 test('Should add default strategy to environment', async () => {
+    const defaultStrategy = {
+        name: 'flexibleRollout',
+        constraints: [],
+        parameters: {
+            rollout: '50',
+            stickiness: 'customAppName',
+            groupId: 'stickytoggle',
+        },
+    };
+
     await app.request
         .post(
             `/api/admin/projects/default/environments/default/default-strategy`,
         )
-        .send({
-            name: 'flexibleRollout',
-            constraints: [],
-            parameters: {
-                rollout: '50',
-                stickiness: 'customAppName',
-                groupId: 'stickytoggle',
-            },
-        })
+        .send(defaultStrategy)
         .expect(200);
 
     const envs =
@@ -134,15 +136,15 @@ test('Should add default strategy to environment', async () => {
     expect(envs).toHaveLength(1);
     expect(envs[0]).toStrictEqual({
         environment: 'default',
-        defaultStrategy: {
-            name: 'flexibleRollout',
-            constraints: [],
-            parameters: {
-                rollout: '50',
-                stickiness: 'customAppName',
-                groupId: 'stickytoggle',
-            },
-        },
+        defaultStrategy,
+    });
+    const { body } = await app.getRecordedEvents();
+    expect(body.events[0]).toMatchObject({
+        type: 'default-strategy-updated',
+        project: 'default',
+        environment: 'default',
+        data: defaultStrategy,
+        preData: null,
     });
 });