diff --git a/server/src/main/java/org/opensearch/index/mapper/DerivedFieldSupportedTypes.java b/server/src/main/java/org/opensearch/index/mapper/DerivedFieldSupportedTypes.java
index c04a760ff7cf1..b39de5788d98a 100644
--- a/server/src/main/java/org/opensearch/index/mapper/DerivedFieldSupportedTypes.java
+++ b/server/src/main/java/org/opensearch/index/mapper/DerivedFieldSupportedTypes.java
@@ -31,7 +31,7 @@
 import java.util.function.Function;
 import java.util.stream.Collectors;
 
-public enum DerivedFieldSupportedTypes {
+enum DerivedFieldSupportedTypes {
 
     BOOLEAN("boolean", (name, context) -> {
         BooleanFieldMapper.Builder builder = new BooleanFieldMapper.Builder(name);