diff --git a/src/main/java/org/springframework/data/elasticsearch/repository/config/ElasticsearchRepositoryConfigExtension.java b/src/main/java/org/springframework/data/elasticsearch/repository/config/ElasticsearchRepositoryConfigExtension.java
index fa7b429ce..05bd8eb74 100644
--- a/src/main/java/org/springframework/data/elasticsearch/repository/config/ElasticsearchRepositoryConfigExtension.java
+++ b/src/main/java/org/springframework/data/elasticsearch/repository/config/ElasticsearchRepositoryConfigExtension.java
@@ -19,6 +19,7 @@ import java.lang.annotation.Annotation;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
+import java.util.List;
 import java.util.Locale;
 
 import org.springframework.beans.factory.support.BeanDefinitionBuilder;
@@ -41,6 +42,7 @@ import org.w3c.dom.Element;
  * @author Mohsin Husen
  * @author Mark Paluch
  * @author Christoph Strobl
+ * @author Junghoon Ban
  */
 public class ElasticsearchRepositoryConfigExtension extends RepositoryConfigurationExtensionSupport {
 
@@ -106,7 +108,7 @@ public class ElasticsearchRepositoryConfigExtension extends RepositoryConfigurat
 	*/
 	@Override
 	protected Collection<Class<?>> getIdentifyingTypes() {
-		return Arrays.asList(ElasticsearchRepository.class, ElasticsearchRepository.class);
+		return List.of(ElasticsearchRepository.class);
 	}
 
 	/*