diff --git a/src/main/java/org/prebid/server/bidder/amx/AmxBidder.java b/src/main/java/org/prebid/server/bidder/amx/AmxBidder.java
index 602f47ab5d6..9f12e60c357 100644
--- a/src/main/java/org/prebid/server/bidder/amx/AmxBidder.java
+++ b/src/main/java/org/prebid/server/bidder/amx/AmxBidder.java
@@ -44,7 +44,7 @@ public class AmxBidder implements Bidder<BidRequest> {
             new TypeReference<ExtPrebid<?, ExtImpAmx>>() {
             };
 
-    private static final String ADAPTER_VERSION = "pbs1.0";
+    private static final String ADAPTER_VERSION = "pbs1.1";
     private static final String VERSION_PARAM = "v";
     private static final String VAST_SEARCH_POINT = "</Impression>";
     private static final String VAST_IMPRESSION_FORMAT = "<Impression><![CDATA[%s]]></Impression>";
@@ -162,11 +162,12 @@ private List<BidderBid> bidsFromResponse(BidResponse bidResponse, List<BidderErr
     }
 
     private BidderBid createBidderBid(Bid bid, String cur, List<BidderError> errors) {
-        AmxBidExt amxBidExt = null;
+        final AmxBidExt amxBidExt;
         try {
             amxBidExt = parseBidderExt(bid.getExt());
         } catch (PreBidException e) {
             errors.add(BidderError.badInput(e.getMessage()));
+            return null;
         }
 
         final BidType bidType = getMediaType(amxBidExt);
diff --git a/src/test/java/org/prebid/server/bidder/amx/AmxBidderTest.java b/src/test/java/org/prebid/server/bidder/amx/AmxBidderTest.java
index 1aafc804b8c..eb5deed54fc 100644
--- a/src/test/java/org/prebid/server/bidder/amx/AmxBidderTest.java
+++ b/src/test/java/org/prebid/server/bidder/amx/AmxBidderTest.java
@@ -77,7 +77,7 @@ public void makeHttpRequestsShouldCreateCorrectURL() {
         assertThat(result.getErrors()).isEmpty();
         assertThat(result.getValue()).hasSize(1)
                 .extracting(HttpRequest::getUri)
-                .containsExactly("https://test.com/prebid/bid?v=pbs1.0");
+                .containsExactly("https://test.com/prebid/bid?v=pbs1.1");
     }
 
     @Test
@@ -215,6 +215,31 @@ public void makeBidsShouldReturnErrorIfAdmNotContainSearchPoint() throws JsonPro
                         BidderError.badServerResponse("Adm should contain vast search point in bidder: bidId"));
     }
 
+    @Test
+    public void makeBidsShouldSkipBidAndAddErrorIfFailedToParseBidExt() throws JsonProcessingException {
+        // given
+        final ObjectNode bidExt = mapper.createObjectNode();
+        bidExt.put("startdelay", "2");
+        final HttpCall<BidRequest> httpCall = givenHttpCall(BidRequest.builder().build(),
+                mapper.writeValueAsString(
+                        givenBidResponse(bidBuilder -> bidBuilder
+                                .id("bidId")
+                                .adm("</Impression>")
+                                .ext(mapper.createObjectNode().set("startdelay", mapper.createObjectNode())))));
+
+        // when
+        final Result<List<BidderBid>> result = amxBidder.makeBids(httpCall, null);
+
+        // then
+        assertThat(result.getErrors()).hasSize(1)
+                .satisfies(error -> {
+                    assertThat(error).extracting(BidderError::getType).containsExactly(BidderError.Type.bad_input);
+                    assertThat(error).extracting(BidderError::getMessage)
+                            .element(0).asString().startsWith("Cannot deserialize instance");
+                });
+        assertThat(result.getValue()).isEmpty();
+    }
+
     @Test
     public void makeBidsShouldReturnErrorIfAdmIsNotPresent() throws JsonProcessingException {
         // given
diff --git a/src/test/java/org/prebid/server/it/AmxTest.java b/src/test/java/org/prebid/server/it/AmxTest.java
index 2ec0bb9fd15..98b5aa4e9db 100644
--- a/src/test/java/org/prebid/server/it/AmxTest.java
+++ b/src/test/java/org/prebid/server/it/AmxTest.java
@@ -27,7 +27,7 @@ public void openrtb2AuctionShouldRespondWithBidsFromAmx() throws IOException, JS
         // given
         // Amx bid response for imp
         WIRE_MOCK_RULE.stubFor(post(urlPathEqualTo("/amx-exchange"))
-                .withQueryParam("v", equalTo("pbs1.0"))
+                .withQueryParam("v", equalTo("pbs1.1"))
                 .withHeader("Content-Type", equalToIgnoreCase("application/json;charset=UTF-8"))
                 .withRequestBody(equalToJson(jsonFrom("openrtb2/amx/test-amx-bid-request.json")))
                 .willReturn(aResponse().withBody(