diff --git a/src/main/java/io/gravitee/repository/analytics/query/Aggregation.java b/src/main/java/io/gravitee/repository/analytics/query/Aggregation.java
index 221b8b8c..93d9be08 100644
--- a/src/main/java/io/gravitee/repository/analytics/query/Aggregation.java
+++ b/src/main/java/io/gravitee/repository/analytics/query/Aggregation.java
@@ -24,4 +24,6 @@ public interface Aggregation {
     AggregationType type();
 
     String field();
+
+    Integer size();
 }
diff --git a/src/main/java/io/gravitee/repository/analytics/query/DateHistogramQueryBuilder.java b/src/main/java/io/gravitee/repository/analytics/query/DateHistogramQueryBuilder.java
index 7e447a36..4c7ece60 100644
--- a/src/main/java/io/gravitee/repository/analytics/query/DateHistogramQueryBuilder.java
+++ b/src/main/java/io/gravitee/repository/analytics/query/DateHistogramQueryBuilder.java
@@ -35,6 +35,10 @@ public DateHistogramQueryBuilder aggregation(Aggregation aggregation) {
     }
 
     public DateHistogramQueryBuilder aggregation(AggregationType type, String field) {
+        return aggregation(type, field, null);
+    }
+
+    public DateHistogramQueryBuilder aggregation(AggregationType type, String field, Integer size) {
         query.aggregations().add(new Aggregation() {
             @Override
             public AggregationType type() {
@@ -45,6 +49,11 @@ public AggregationType type() {
             public String field() {
                 return field;
             }
+
+            @Override
+            public Integer size() {
+                return size;
+            }
         });
 
         return this;
diff --git a/src/main/java/io/gravitee/repository/healthcheck/query/DateHistogramQueryBuilder.java b/src/main/java/io/gravitee/repository/healthcheck/query/DateHistogramQueryBuilder.java
index 6584cb8e..74bc2c98 100644
--- a/src/main/java/io/gravitee/repository/healthcheck/query/DateHistogramQueryBuilder.java
+++ b/src/main/java/io/gravitee/repository/healthcheck/query/DateHistogramQueryBuilder.java
@@ -38,6 +38,10 @@ public DateHistogramQueryBuilder aggregation(Aggregation aggregation) {
     }
 
     public DateHistogramQueryBuilder aggregation(AggregationType type, String field) {
+        return aggregation(type, field, null);
+    }
+
+    public DateHistogramQueryBuilder aggregation(AggregationType type, String field, Integer size) {
         query.aggregations().add(new Aggregation() {
             @Override
             public AggregationType type() {
@@ -48,6 +52,11 @@ public AggregationType type() {
             public String field() {
                 return field;
             }
+
+            @Override
+            public Integer size() {
+                return size;
+            }
         });
 
         return this;