diff --git a/package-lock.json b/package-lock.json
index db93a3d..c65fd49 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,7 @@
             "version": "0.0.1",
             "license": "MIT",
             "dependencies": {
-                "@monetizationos/proxy": "1.4.3"
+                "@monetizationos/proxy": "1.5.2"
             },
             "devDependencies": {
                 "@biomejs/biome": "2.4.16",
@@ -1517,9 +1517,9 @@
             }
         },
         "node_modules/@monetizationos/proxy": {
-            "version": "1.4.3",
-            "resolved": "https://registry.npmjs.org/@monetizationos/proxy/-/proxy-1.4.3.tgz",
-            "integrity": "sha512-nSzTbQVLzXripFF8bzXRhZ2nqZVIQLwZINspE/HARBeBv2fzm0YQhqvEXnqmgoMHAZjxOPhkw8E3ELRKnlP2dg==",
+            "version": "1.5.2",
+            "resolved": "https://registry.npmjs.org/@monetizationos/proxy/-/proxy-1.5.2.tgz",
+            "integrity": "sha512-qzUETTxMnh4squEDkJysC8rhM4yMu68Vm/GbhU9fRlKGLA9niJG8qa5lbC8HUgTbnmC1bSsWhipRvvyn6OlvOg==",
             "license": "MIT",
             "dependencies": {
                 "cookie": "^1.1.1"
diff --git a/package.json b/package.json
index bf34776..571904c 100644
--- a/package.json
+++ b/package.json
@@ -56,6 +56,6 @@
         "wrangler": "^4.95.0"
     },
     "dependencies": {
-        "@monetizationos/proxy": "1.4.3"
+        "@monetizationos/proxy": "1.5.2"
     }
 }
diff --git a/src/index.ts b/src/index.ts
index 92b4aaf..c8ecab3 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -35,6 +35,7 @@ const proxy = new MOSProxyBuilder()
             }
         },
     })
+    .withClientIP((request) => request.headers.get('CF-Connecting-IP') ?? undefined)
     .build()
 
 export default {
diff --git a/test/index.spec.ts b/test/index.spec.ts
index d990967..a828c81 100644
--- a/test/index.spec.ts
+++ b/test/index.spec.ts
@@ -1,5 +1,5 @@
 import { env, fetchMock, SELF } from 'cloudflare:test'
-import { afterEach, beforeAll, describe, expect, it } from 'vitest'
+import { afterEach, beforeAll, describe, expect, it, vi } from 'vitest'
 import { mockOriginFetch, mockSurfaceDecisionsFetch, surfaceDecisionsResponse } from './helpers'
 
 describe('MonetizationOS Proxy', () => {
@@ -102,6 +102,75 @@ describe('MonetizationOS Proxy', () => {
         )
     })
 
+    it('sends CF-Connecting-IP as http.clientIP in surface decisions payload', async () => {
+        mockOriginFetch()
+        const mockSurfaceDecision = mockSurfaceDecisionsFetch()
+
+        const req = new Request('https://test.example/index.html', {
+            headers: { 'CF-Connecting-IP': '203.0.113.10' },
+        })
+        await SELF.fetch(req)
+
+        expect(mockSurfaceDecision).toHaveBeenCalledWith(
+            expect.objectContaining({
+                http: expect.objectContaining({ clientIP: '203.0.113.10' }),
+            }),
+        )
+    })
+
+    it('sends Referer header in http.referer in surface decisions payload', async () => {
+        mockOriginFetch()
+        const mockSurfaceDecision = mockSurfaceDecisionsFetch()
+
+        const req = new Request('https://test.example/index.html', {
+            headers: { Referer: 'https://test.example/previous-page' },
+        })
+        await SELF.fetch(req)
+
+        expect(mockSurfaceDecision).toHaveBeenCalledWith(
+            expect.objectContaining({
+                http: expect.objectContaining({ referer: 'https://test.example/previous-page' }),
+            }),
+        )
+    })
+
+    it('sends Referer header in http.referer for offer redemption requests', async () => {
+        const mockOfferRedemption = vi.fn()
+        fetchMock
+            .get('https://api.monetizationos.com')
+            .intercept({ path: '/api/v1/offer-redemptions', method: 'POST' })
+            .reply((data) => {
+                mockOfferRedemption(JSON.parse(data.body as string))
+                return {
+                    statusCode: 200,
+                    data: JSON.stringify({ success: true }),
+                    responseOptions: { headers: { 'Content-Type': 'application/json' } },
+                }
+            })
+
+        const req = new Request('https://test.example/mos-api/offer-redemptions', {
+            method: 'POST',
+            headers: {
+                'Content-Type': 'application/json',
+                Cookie: 'anon-session=the-session',
+                Referer: 'https://test.example/article/tombstone',
+            },
+            body: JSON.stringify({ offerToken: 'offer.abc' }),
+        })
+        const res = await SELF.fetch(req)
+
+        expect(res.status).toBe(200)
+        expect(mockOfferRedemption).toHaveBeenCalledWith(
+            expect.objectContaining({
+                offerToken: 'offer.abc',
+                http: expect.objectContaining({
+                    url: 'https://test.example/mos-api/offer-redemptions',
+                    referer: 'https://test.example/article/tombstone',
+                }),
+            }),
+        )
+    })
+
     it('sends origin status code in http.proxyOrigin.status in surface decisions payload', async () => {
         mockOriginFetch({ status: 404, responseBody: '<html><body>Not Found</body></html>' })
         const mockSurfaceDecision = mockSurfaceDecisionsFetch()