diff --git a/adapters/rubicon/rubicon.go b/adapters/rubicon/rubicon.go
index ee737bd05ea..a69530de831 100644
--- a/adapters/rubicon/rubicon.go
+++ b/adapters/rubicon/rubicon.go
@@ -49,15 +49,23 @@ type rubiconParams struct {
 }
 
 type bidRequestExt struct {
-	Rubicon bidRequestExtRubicon `json:"rubicon,omitempty"`
+	Prebid bidRequestExtPrebid `json:"prebid"`
 }
 
-type bidRequestExtRubicon struct {
-	Debug bidRequestExtRubiconDebug `json:"debug,omitempty"`
+type bidRequestExtPrebid struct {
+	Bidders bidRequestExtPrebidBidders `json:"bidders"`
 }
 
-type bidRequestExtRubiconDebug struct {
-	CpmOverride float64 `json:"cpmOverride,omitempty"`
+type bidRequestExtPrebidBidders struct {
+	Rubicon prebidBiddersRubicon `json:"rubicon,omitempty"`
+}
+
+type prebidBiddersRubicon struct {
+	Debug prebidBiddersRubiconDebug `json:"debug,omitempty"`
+}
+
+type prebidBiddersRubiconDebug struct {
+	CpmOverride float64 `json:"cpmoverride,omitempty"`
 }
 
 type rubiconImpExtRPTrack struct {
@@ -952,7 +960,7 @@ func cmpOverrideFromBidRequest(bidRequest *openrtb.BidRequest) float64 {
 		return 0
 	}
 
-	return bidRequestExt.Rubicon.Debug.CpmOverride
+	return bidRequestExt.Prebid.Bidders.Rubicon.Debug.CpmOverride
 }
 
 func mapImpIdToCpmOverride(imps []openrtb.Imp) map[string]float64 {
diff --git a/adapters/rubicon/rubicon_test.go b/adapters/rubicon/rubicon_test.go
index 7a2cc28896b..0489797561b 100644
--- a/adapters/rubicon/rubicon_test.go
+++ b/adapters/rubicon/rubicon_test.go
@@ -1442,10 +1442,12 @@ func TestOpenRTBResponseOverridePriceFromBidRequest(t *testing.T) {
 				"zoneId": 327642
 			}}`),
 		}},
-		Ext: json.RawMessage(`{"rubicon": {
-				"debug": {
-					"cpmOverride" : 10 
-				}}}`),
+		Ext: json.RawMessage(`{"prebid": {
+			"bidders": {
+				"rubicon": {
+					"debug": {
+						"cpmoverride": 10
+			}}}}}`),
 	}
 
 	requestJson, _ := json.Marshal(request)
@@ -1486,14 +1488,16 @@ func TestOpenRTBResponseOverridePriceFromCorrespondingImp(t *testing.T) {
 				"siteId": 68780,
 				"zoneId": 327642,
 				"debug": {
-					"cpmOverride" : 20 
+					"cpmoverride" : 20 
 				}
 			}}`),
 		}},
-		Ext: json.RawMessage(`{"rubicon": {
-				"debug": {
-					"cpmOverride" : 10 
-				}}}`),
+		Ext: json.RawMessage(`{"prebid": {
+			"bidders": {
+				"rubicon": {
+					"debug": {
+						"cpmoverride": 10
+			}}}}}`),
 	}
 
 	requestJson, _ := json.Marshal(request)
diff --git a/openrtb_ext/imp_rubicon.go b/openrtb_ext/imp_rubicon.go
index 17585a8ee93..ee43d9659b8 100644
--- a/openrtb_ext/imp_rubicon.go
+++ b/openrtb_ext/imp_rubicon.go
@@ -27,5 +27,5 @@ type rubiconVideoParams struct {
 
 // rubiconVideoParams defines the contract for bidrequest.imp[i].ext.rubicon.debug
 type impExtRubiconDebug struct {
-	CpmOverride float64 `json:"cpmOverride,omitempty"`
+	CpmOverride float64 `json:"cpmoverride,omitempty"`
 }