diff --git a/flint-core/src/main/scala/org/opensearch/flint/core/storage/FlintOpenSearchClient.java b/flint-core/src/main/scala/org/opensearch/flint/core/storage/FlintOpenSearchClient.java
index 9f3cf824a..4e549df2b 100644
--- a/flint-core/src/main/scala/org/opensearch/flint/core/storage/FlintOpenSearchClient.java
+++ b/flint-core/src/main/scala/org/opensearch/flint/core/storage/FlintOpenSearchClient.java
@@ -17,9 +17,9 @@
 import java.util.List;
 import java.util.Locale;
 import java.util.Objects;
+import java.util.Set;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.logging.Logger;
-import java.util.Set;
 import java.util.stream.Collectors;
 import org.apache.http.HttpHost;
 import org.apache.http.auth.AuthScope;