diff --git a/src/main/java/org/gitlab4j/api/Constants.java b/src/main/java/org/gitlab4j/api/Constants.java
index f96945c5780dd0b83ce11112d23f99db39caf18b..824cb4492dd8f6c03fcb0b2c7119cc933a9e9c81 100644
--- a/src/main/java/org/gitlab4j/api/Constants.java
+++ b/src/main/java/org/gitlab4j/api/Constants.java
@@ -248,7 +248,7 @@ public interface Constants {
     /** Enum to use for ordering the results of getGroups() and getSubGroups(). */
     public enum GroupOrderBy {
 
-        NAME, PATH, ID;
+        NAME, PATH, ID, SIMILARITY;
         private static JacksonJsonEnumHelper<GroupOrderBy> enumHelper = new JacksonJsonEnumHelper<>(GroupOrderBy.class);
 
         @JsonCreator