diff --git a/package.json b/package.json
index ec4c43d09..fe0f93261 100644
--- a/package.json
+++ b/package.json
@@ -101,7 +101,7 @@
 		"webpack-merge": "^6.0.1"
 	},
 	"dependencies": {
-		"@guardian/prebid.js": "git://github.com/guardian/prebid.js.git#0094807476fec7d9fc3f6535203b33668e5d22ef",
+		"@guardian/prebid.js": "git://github.com/guardian/prebid.js.git#5420130eae23aec16cc1133d5ca32ab2a3cfe801",
 		"fastdom": "^1.0.12",
 		"lodash-es": "^4.17.21",
 		"process": "^0.11.10",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index bc886d904..5b6b3374c 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -9,8 +9,8 @@ importers:
   .:
     dependencies:
       '@guardian/prebid.js':
-        specifier: git://github.com/guardian/prebid.js.git#0094807476fec7d9fc3f6535203b33668e5d22ef
-        version: https://codeload.github.com/guardian/prebid.js/tar.gz/0094807476fec7d9fc3f6535203b33668e5d22ef(babel-core@7.0.0-bridge.0(@babel/core@7.26.0))(ejs@3.1.10)(tslib@2.8.1)(typescript@5.5.4)
+        specifier: git://github.com/guardian/prebid.js.git#5420130eae23aec16cc1133d5ca32ab2a3cfe801
+        version: https://codeload.github.com/guardian/prebid.js/tar.gz/5420130eae23aec16cc1133d5ca32ab2a3cfe801(babel-core@7.0.0-bridge.0(@babel/core@7.26.0))(ejs@3.1.10)(tslib@2.8.1)(typescript@5.5.4)
       fastdom:
         specifier: ^1.0.12
         version: 1.0.12
@@ -1022,8 +1022,8 @@ packages:
       typescript:
         optional: true
 
-  '@guardian/prebid.js@https://codeload.github.com/guardian/prebid.js/tar.gz/0094807476fec7d9fc3f6535203b33668e5d22ef':
-    resolution: {tarball: https://codeload.github.com/guardian/prebid.js/tar.gz/0094807476fec7d9fc3f6535203b33668e5d22ef}
+  '@guardian/prebid.js@https://codeload.github.com/guardian/prebid.js/tar.gz/5420130eae23aec16cc1133d5ca32ab2a3cfe801':
+    resolution: {tarball: https://codeload.github.com/guardian/prebid.js/tar.gz/5420130eae23aec16cc1133d5ca32ab2a3cfe801}
     version: 9.27.0
     engines: {node: '>=20.0.0'}
 
@@ -6181,7 +6181,7 @@ snapshots:
     optionalDependencies:
       typescript: 5.5.4
 
-  '@guardian/prebid.js@https://codeload.github.com/guardian/prebid.js/tar.gz/0094807476fec7d9fc3f6535203b33668e5d22ef(babel-core@7.0.0-bridge.0(@babel/core@7.26.0))(ejs@3.1.10)(tslib@2.8.1)(typescript@5.5.4)':
+  '@guardian/prebid.js@https://codeload.github.com/guardian/prebid.js/tar.gz/5420130eae23aec16cc1133d5ca32ab2a3cfe801(babel-core@7.0.0-bridge.0(@babel/core@7.26.0))(ejs@3.1.10)(tslib@2.8.1)(typescript@5.5.4)':
     dependencies:
       '@babel/core': 7.26.0
       '@babel/plugin-transform-runtime': 7.25.9(@babel/core@7.26.0)
diff --git a/src/init/consented/prepare-prebid.ts b/src/init/consented/prepare-prebid.ts
index c251f8643..7aacbbfc0 100644
--- a/src/init/consented/prepare-prebid.ts
+++ b/src/init/consented/prepare-prebid.ts
@@ -41,7 +41,7 @@ const loadPrebid = async (framework: ConsentFramework): Promise<void> => {
 	if (shouldLoadPrebid()) {
 		await import(
 			/* webpackChunkName: "Prebid.js" */
-			`@guardian/prebid.js/build/dist/${prebidVersion()}/prebid`
+			`@guardian/prebid.js/build/dist/${prebidVersion()}/prebid.js`
 		);
 		prebid.initialise(window, framework);
 	}
diff --git a/src/lib/header-bidding/prebid/prebid.spec.ts b/src/lib/header-bidding/prebid/prebid.spec.ts
index 364c90fcf..433b0a247 100644
--- a/src/lib/header-bidding/prebid/prebid.spec.ts
+++ b/src/lib/header-bidding/prebid/prebid.spec.ts
@@ -74,13 +74,13 @@ describe('initialise', () => {
 			maxNestedIframes: 10,
 			mediaTypePriceGranularity: {},
 			priceGranularity: 'custom',
-			publisherDomain: undefined,
 			s2sConfig: {
 				adapter: 'prebidServer',
 				adapterOptions: {},
 				allowUnknownBidderCodes: false,
 				bidders: [],
 				maxBids: 1,
+				maxTimeout: 1500,
 				ortbNative: {
 					eventtrackers: [
 						{
@@ -91,7 +91,6 @@ describe('initialise', () => {
 				},
 				syncTimeout: 1000,
 				syncUrlModifier: {},
-				timeout: 1000,
 			},
 			timeoutBuffer: 400,
 			useBidCache: false,
@@ -109,7 +108,7 @@ describe('initialise', () => {
 						},
 					},
 				],
-				auctionDelay: 0,
+				auctionDelay: 500,
 				filterSettings: {
 					all: {
 						bidders: '*',