diff --git a/src/main/java/org/prebid/server/proto/openrtb/ext/request/ix/ExtImpIx.java b/src/main/java/org/prebid/server/proto/openrtb/ext/request/ix/ExtImpIx.java
index e7a8faee424..f91aa6cc0fb 100644
--- a/src/main/java/org/prebid/server/proto/openrtb/ext/request/ix/ExtImpIx.java
+++ b/src/main/java/org/prebid/server/proto/openrtb/ext/request/ix/ExtImpIx.java
@@ -1,5 +1,6 @@
 package org.prebid.server.proto.openrtb.ext.request.ix;
 
+import com.fasterxml.jackson.annotation.JsonAlias;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import lombok.AllArgsConstructor;
 import lombok.Value;
@@ -11,6 +12,7 @@
 public class ExtImpIx {
 
     @JsonProperty("siteId")
+    @JsonAlias({"siteid", "siteID"})
     String siteId;
 
     List<Integer> size;
diff --git a/src/main/resources/static/bidder-params/ix.json b/src/main/resources/static/bidder-params/ix.json
index da22db69803..f5a357c16f4 100644
--- a/src/main/resources/static/bidder-params/ix.json
+++ b/src/main/resources/static/bidder-params/ix.json
@@ -18,7 +18,9 @@
       "description": "An array of two integer containing the dimension"
     }
   },
-  "required": [
-    "siteId"
+  "oneOf": [
+    {"required": ["siteid"]},
+    {"required": ["siteId"]},
+    {"required": ["siteID"]}
   ]
 }
diff --git a/src/test/java/org/prebid/server/bidder/ix/IxBidderTest.java b/src/test/java/org/prebid/server/bidder/ix/IxBidderTest.java
index 98a7d6e006c..1c6b01e7603 100644
--- a/src/test/java/org/prebid/server/bidder/ix/IxBidderTest.java
+++ b/src/test/java/org/prebid/server/bidder/ix/IxBidderTest.java
@@ -244,6 +244,37 @@ public void makeHttpRequestsShouldLimitImpsAmount() {
         assertThat(result.getValue()).hasSize(REQUEST_LIMIT);
     }
 
+    @Test
+    public void makeHttpRequestsShouldAcceptDifferentSiteIdAliases() {
+        final List<Imp> imps = asList(
+                givenImp(impBuilder -> impBuilder
+                        .id("123")
+                        .ext(mapper.createObjectNode().set("bidder",
+                                mapper.createObjectNode().put("siteid", "siteId1")))),
+                givenImp(impBuilder -> impBuilder
+                        .id("346")
+                        .ext(mapper.createObjectNode().set("bidder",
+                                mapper.createObjectNode().put("siteId", "siteId2")))),
+                givenImp(impBuilder -> impBuilder
+                        .id("678")
+                        .ext(mapper.createObjectNode().set("bidder",
+                                mapper.createObjectNode().put("siteID", "siteId3")))));
+        final BidRequest bidRequest = givenBidRequest(requestBuilder ->
+                requestBuilder.imp(imps).site(Site.builder().build()), identity());
+
+        // when
+        final Result<List<HttpRequest<BidRequest>>> result = ixBidder.makeHttpRequests(bidRequest);
+
+        // then
+        assertThat(result.getErrors()).isEmpty();
+        assertThat(result.getValue())
+                .extracting(HttpRequest::getPayload)
+                .extracting(BidRequest::getSite)
+                .extracting(Site::getPublisher)
+                .extracting(Publisher::getId)
+                .containsExactlyInAnyOrder("siteId1", "siteId2", "siteId3");
+    }
+
     @Test
     public void makeHttpRequestsShouldLimitTotalAmountOfRequests() {
         // given
@@ -620,7 +651,7 @@ private static BidRequest givenBidRequest(Function<Imp.ImpBuilder, Imp.ImpBuilde
     private static Imp givenImp(Function<Imp.ImpBuilder, Imp.ImpBuilder> impCustomizer) {
         return impCustomizer.apply(Imp.builder()
                         .id("123")
-                        .banner(Banner.builder().build())
+                        .banner(Banner.builder().w(1).h(1).build())
                         .ext(mapper.valueToTree(ExtPrebid.of(null, ExtImpIx.of(SITE_ID, null)))))
                 .build();
     }