diff --git a/src/main/java/org/prebid/server/bidder/adnuntius/AdnuntiusBidder.java b/src/main/java/org/prebid/server/bidder/adnuntius/AdnuntiusBidder.java
index 672f31dd8af..2139a835e41 100644
--- a/src/main/java/org/prebid/server/bidder/adnuntius/AdnuntiusBidder.java
+++ b/src/main/java/org/prebid/server/bidder/adnuntius/AdnuntiusBidder.java
@@ -213,7 +213,7 @@ private List<HttpRequest<AdnuntiusRequest>> createHttpRequests(Map<String, List<
     private String createUri(BidRequest bidRequest, Boolean noCookies) {
         try {
             final URIBuilder uriBuilder = new URIBuilder(endpointUrl)
-                    .addParameter("format", "prebid")
+                    .addParameter("format", "prebidServer")
                     .addParameter("tzo", getTimeZoneOffset());
 
             final String gdpr = extractGdpr(bidRequest.getRegs());
diff --git a/src/test/java/org/prebid/server/bidder/adnuntius/AdnuntiusBidderTest.java b/src/test/java/org/prebid/server/bidder/adnuntius/AdnuntiusBidderTest.java
index c911aed14c5..6eb8e7b44e2 100644
--- a/src/test/java/org/prebid/server/bidder/adnuntius/AdnuntiusBidderTest.java
+++ b/src/test/java/org/prebid/server/bidder/adnuntius/AdnuntiusBidderTest.java
@@ -1004,7 +1004,7 @@ private static String givenExpectedUrl(Boolean noCookies) {
     }
 
     private static String buildExpectedUrl(Integer gdpr, String consent, Boolean noCookies) {
-        final StringBuilder expectedUri = new StringBuilder("https://test.domain.dm/uri?format=prebid&tzo=-300");
+        final StringBuilder expectedUri = new StringBuilder("https://test.domain.dm/uri?format=prebidServer&tzo=-300");
         if (gdpr != null) {
             expectedUri.append("&gdpr=").append(HttpUtil.encodeUrl(gdpr.toString()));
         }