diff --git a/packages/outbox-prisma-adapter/lib/outbox-prisma-adapter.ts b/packages/outbox-prisma-adapter/lib/outbox-prisma-adapter.ts
index 6b27b448..412620c8 100644
--- a/packages/outbox-prisma-adapter/lib/outbox-prisma-adapter.ts
+++ b/packages/outbox-prisma-adapter/lib/outbox-prisma-adapter.ts
@@ -22,14 +22,37 @@ export class OutboxPrismaAdapter<SupportedEvents extends CommonEventDefinition[]
         id: outboxEntry.id,
         type: messageType,
         created: outboxEntry.created,
+        updated: outboxEntry.updated,
         data: outboxEntry.data,
         status: outboxEntry.status,
       },
     })
   }
 
-  flush(outboxAccumulator: OutboxAccumulator<SupportedEvents>): Promise<void> {
-    return Promise.resolve(undefined)
+  async flush(outboxAccumulator: OutboxAccumulator<SupportedEvents>): Promise<void> {
+    const entries = await outboxAccumulator.getEntries()
+
+    const prismaModel: PrismaClient[typeof this.modelName] = this.prisma[this.modelName]
+
+    for (const entry of entries) {
+      await prismaModel.upsert({
+        where: {
+          id: entry.id,
+        },
+        update: {
+          status: 'SUCCESS',
+          updated: new Date(),
+        },
+        create: {
+          id: entry.id,
+          type: getMessageType(entry.event),
+          created: entry.created,
+          updated: new Date(),
+          data: entry.data,
+          status: 'SUCCESS',
+        },
+      })
+    }
   }
 
   getEntries(maxRetryCount: number): Promise<OutboxEntry<SupportedEvents[number]>[]> {
diff --git a/packages/outbox-prisma-adapter/test/outbox-prisma-adapter.spec.ts b/packages/outbox-prisma-adapter/test/outbox-prisma-adapter.spec.ts
index 6b74b13f..c58cd8ed 100644
--- a/packages/outbox-prisma-adapter/test/outbox-prisma-adapter.spec.ts
+++ b/packages/outbox-prisma-adapter/test/outbox-prisma-adapter.spec.ts
@@ -1,4 +1,4 @@
-import type { OutboxEntry } from '@message-queue-toolkit/outbox-core'
+import { InMemoryOutboxAccumulator, type OutboxEntry } from '@message-queue-toolkit/outbox-core'
 import {
   type CommonEventDefinition,
   enrichMessageSchemaWithBase,
@@ -37,6 +37,7 @@ describe('outbox-prisma-adapter', () => {
         id UUID PRIMARY KEY, 
         type TEXT NOT NULL,
         created TIMESTAMP NOT NULL,
+        updated TIMESTAMP,
         retry_count INT NOT NULL DEFAULT 0,
         data JSONB NOT NULL,
         status TEXT NOT NULL
@@ -74,6 +75,7 @@ describe('outbox-prisma-adapter', () => {
         id: expect.any(String),
         type: 'entity.created',
         created: expect.any(Date),
+        updated: expect.any(Date),
         retryCount: 0,
         data: {
           id: expect.any(String),
@@ -87,4 +89,124 @@ describe('outbox-prisma-adapter', () => {
       },
     ])
   })
+
+  it('should insert successful entries from accumulator', async () => {
+    const accumulator = new InMemoryOutboxAccumulator<SupportedEvents>()
+
+    const entry1 = {
+      id: uuidv7(),
+      event: events.created,
+      status: 'CREATED',
+      data: {
+        id: uuidv7(),
+        payload: {
+          message: 'TEST EVENT',
+        },
+        metadata: {},
+        timestamp: new Date().toISOString(),
+      },
+      retryCount: 0,
+      created: new Date(),
+    } satisfies OutboxEntry<SupportedEvents[number]>
+    accumulator.add(entry1)
+
+    const entry2 = {
+      id: uuidv7(),
+      event: events.created,
+      status: 'CREATED',
+      data: {
+        id: uuidv7(),
+        payload: {
+          message: 'TEST EVENT 2',
+        },
+        metadata: {},
+        timestamp: new Date().toISOString(),
+      },
+      retryCount: 0,
+      created: new Date(),
+    } satisfies OutboxEntry<SupportedEvents[number]>
+    accumulator.add(entry2)
+
+    await outboxPrismaAdapter.flush(accumulator)
+
+    const entriesAfterFlush = await outboxPrismaAdapter.getEntries(10)
+
+    expect(entriesAfterFlush).toMatchObject([
+      {
+        id: entry1.id,
+        status: 'SUCCESS',
+      },
+      {
+        id: entry2.id,
+        status: 'SUCCESS',
+      },
+    ])
+  })
+
+  it("should update successful entries' status to 'SUCCESS'", async () => {
+    const accumulator = new InMemoryOutboxAccumulator<SupportedEvents>()
+
+    const entry1 = {
+      id: uuidv7(),
+      event: events.created,
+      status: 'CREATED',
+      data: {
+        id: uuidv7(),
+        payload: {
+          message: 'TEST EVENT',
+        },
+        metadata: {},
+        timestamp: new Date().toISOString(),
+      },
+      retryCount: 0,
+      created: new Date(),
+    } satisfies OutboxEntry<SupportedEvents[number]>
+    accumulator.add(entry1)
+
+    const entry2 = {
+      id: uuidv7(),
+      event: events.created,
+      status: 'CREATED',
+      data: {
+        id: uuidv7(),
+        payload: {
+          message: 'TEST EVENT 2',
+        },
+        metadata: {},
+        timestamp: new Date().toISOString(),
+      },
+      retryCount: 0,
+      created: new Date(),
+    } satisfies OutboxEntry<SupportedEvents[number]>
+    accumulator.add(entry2)
+
+    await outboxPrismaAdapter.createEntry(entry1)
+    await outboxPrismaAdapter.createEntry(entry2)
+
+    const beforeFlush = await outboxPrismaAdapter.getEntries(10)
+    expect(beforeFlush).toMatchObject([
+      {
+        id: entry1.id,
+        status: 'CREATED',
+      },
+      {
+        id: entry2.id,
+        status: 'CREATED',
+      },
+    ])
+
+    outboxPrismaAdapter.flush(accumulator)
+
+    const afterFlush = await outboxPrismaAdapter.getEntries(10)
+    expect(afterFlush).toMatchObject([
+      {
+        id: entry1.id,
+        status: 'SUCCESS',
+      },
+      {
+        id: entry2.id,
+        status: 'SUCCESS',
+      },
+    ])
+  })
 })
diff --git a/packages/outbox-prisma-adapter/test/schema.prisma b/packages/outbox-prisma-adapter/test/schema.prisma
index a7196c29..1b3c0ee8 100644
--- a/packages/outbox-prisma-adapter/test/schema.prisma
+++ b/packages/outbox-prisma-adapter/test/schema.prisma
@@ -6,6 +6,7 @@ datasource db {
 model OutboxEntry {
   id         String   @id @default(uuid()) @db.Uuid
   created    DateTime @default(now())
+  updated    DateTime @default(now()) @updatedAt
   type       String
   retryCount Int      @default(0) @map("retry_count")
   data       Json