diff --git a/src/main/java/com/hp/autonomy/iod/client/api/search/FindRelatedConceptsRequestBuilder.java b/src/main/java/com/hp/autonomy/iod/client/api/search/FindRelatedConceptsRequestBuilder.java
index <HASH>..<HASH> 100644
--- a/src/main/java/com/hp/autonomy/iod/client/api/search/FindRelatedConceptsRequestBuilder.java
+++ b/src/main/java/com/hp/autonomy/iod/client/api/search/FindRelatedConceptsRequestBuilder.java
@@ -79,6 +79,16 @@ public class FindRelatedConceptsRequestBuilder {
     private List<String> indexes;
 
     /**
+     * @param maxResults Value for the max_results parameter.
+     */
+    private Integer maxResults;
+
+    /**
+     * @param sampleSize Value for the sample_size parameter.
+     */
+    private Integer sampleSize;
+
+    /**
      * @return A map of query parameters suitable for use with {@link FindRelatedConceptsService}. get is NOT supported on
      * the resulting map
      */
@@ -87,6 +97,8 @@ public class FindRelatedConceptsRequestBuilder {
         map.put("field_text", fieldText);
         map.put("min_score", minScore);
         map.put("print_fields", StringUtils.join(printFields, ','));
+        map.put("max_results", maxResults);
+        map.put("sample_size", sampleSize);
 
         // prefer the DateTime over the numeric versions
         map.putAll(TimeSelector.max(maxDate, maxDateDays, maxDateSeconds));
Add support for Find Related Concepts max_results and sample_size