diff --git a/src/main/java/es/bsc/inb/ga4gh/beacon/network/engine/BeaconNetworkResponseBuilder.java b/src/main/java/es/bsc/inb/ga4gh/beacon/network/engine/BeaconNetworkResponseBuilder.java
index 7e3696c..778973c 100644
--- a/src/main/java/es/bsc/inb/ga4gh/beacon/network/engine/BeaconNetworkResponseBuilder.java
+++ b/src/main/java/es/bsc/inb/ga4gh/beacon/network/engine/BeaconNetworkResponseBuilder.java
@@ -275,6 +275,7 @@ protected BeaconResponseMeta getMeta(
             final List<BeaconQueryFilter> filters = request_query.getFilters();
             if (filters != null) {
                 request_summary.setFilters(filters.stream()
+                        .filter(Objects::nonNull)
                         .map(BeaconQueryFilter::toString)
                         .collect(Collectors.toList()));
             }