diff --git a/src/main/java/org/prebid/server/bidder/audiencenetwork/AudienceNetworkBidder.java b/src/main/java/org/prebid/server/bidder/audiencenetwork/AudienceNetworkBidder.java
index 8266b55934e..5fec6dfee79 100644
--- a/src/main/java/org/prebid/server/bidder/audiencenetwork/AudienceNetworkBidder.java
+++ b/src/main/java/org/prebid/server/bidder/audiencenetwork/AudienceNetworkBidder.java
@@ -117,8 +117,9 @@ private HttpRequest<BidRequest> makeHttpRequest(Imp imp, BidRequest bidRequest,
         final BidRequest outgoingRequest = bidRequest.toBuilder()
                 .imp(Collections.singletonList(modifiedImp))
                 .app(makeApp(bidRequest.getApp(), publisherId))
-                .ext(mapper.fillExtension(
-                        ExtRequest.empty(), AudienceNetworkExt.of(platformId, makeAuthId(bidRequest.getId()))))
+                .ext(mapper.fillExtension(ExtRequest.empty(),
+                        AudienceNetworkExt.of(platformId, makeAuthId(bidRequest.getId()),
+                                platformId)))
                 .build();
 
         return HttpRequest.<BidRequest>builder()
diff --git a/src/main/java/org/prebid/server/bidder/audiencenetwork/proto/AudienceNetworkExt.java b/src/main/java/org/prebid/server/bidder/audiencenetwork/proto/AudienceNetworkExt.java
index 1ada0f11bf0..8b51dbac759 100644
--- a/src/main/java/org/prebid/server/bidder/audiencenetwork/proto/AudienceNetworkExt.java
+++ b/src/main/java/org/prebid/server/bidder/audiencenetwork/proto/AudienceNetworkExt.java
@@ -1,11 +1,17 @@
 package org.prebid.server.bidder.audiencenetwork.proto;
 
+import com.fasterxml.jackson.annotation.JsonProperty;
 import lombok.Value;
 
 @Value(staticConstructor = "of")
 public class AudienceNetworkExt {
 
+    @JsonProperty("platformid")
     String platformid;
 
+    @JsonProperty("authentication_id")
     String authenticationId;
+
+    @JsonProperty("security_app_id")
+    String securityAppId;
 }
diff --git a/src/test/java/org/prebid/server/bidder/audiencenetwork/AudienceNetworkBidderTest.java b/src/test/java/org/prebid/server/bidder/audiencenetwork/AudienceNetworkBidderTest.java
index 2a6081c7857..28d57b98cfd 100644
--- a/src/test/java/org/prebid/server/bidder/audiencenetwork/AudienceNetworkBidderTest.java
+++ b/src/test/java/org/prebid/server/bidder/audiencenetwork/AudienceNetworkBidderTest.java
@@ -483,7 +483,8 @@ public void makeHttpRequestsShouldChangeRequestExt() {
                 .containsOnly(
                         AudienceNetworkExt.of(
                                 "101",
-                                "bd49902da11ce0fe6258e56baa0a69c2f1395b2ff1efb30d4879ed9e2343a3f6"));
+                                "bd49902da11ce0fe6258e56baa0a69c2f1395b2ff1efb30d4879ed9e2343a3f6",
+                                "101"));
     }
 
     @Test
diff --git a/src/test/resources/org/prebid/server/it/openrtb2/audiencenetwork/test-audiencenetwork-bid-request.json b/src/test/resources/org/prebid/server/it/openrtb2/audiencenetwork/test-audiencenetwork-bid-request.json
index a4d2bf884dd..7383f8f91a1 100644
--- a/src/test/resources/org/prebid/server/it/openrtb2/audiencenetwork/test-audiencenetwork-bid-request.json
+++ b/src/test/resources/org/prebid/server/it/openrtb2/audiencenetwork/test-audiencenetwork-bid-request.json
@@ -38,6 +38,7 @@
   },
   "ext": {
     "authentication_id": "48b7d18b921be9887a5351f31cc85f1326e3da1d8c402dec2bd338cf10bd6b43",
-    "platformid": "101"
+    "platformid": "101",
+    "security_app_id": "101"
   }
 }