diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4d0512de31..2d3936e08d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -26,6 +26,8 @@ This section is for maintaining a changelog for all breaking changes for the cli
 - Changed type of `DanglingIndex`'s `creationDateMillis` field from `String` to `long` ([#1124](https://github.com/opensearch-project/opensearch-java/pull/1124))
 - Changed type of `ShardStatistics`'s `total`, `successful`, `failed` & `skipped` fields from `Number` to `int/Integer` ([#1158](https://github.com/opensearch-project/opensearch-java/pull/1158))
 - Unified `tasks.Info` and `tasks.State` classes into `tasks.TaskInfo` ([#1187](https://github.com/opensearch-project/opensearch-java/pull/1187))
+- Changed type of `Hit`'s `sort` field from `List<String>` to `List<FieldValue>` ([#1225](https://github.com/opensearch-project/opensearch-java/pull/1225))
+- Changed type of `MultisearchBody`'s `searchAfter` field from `List<String>` to `List<FieldValue>` ([#1225](https://github.com/opensearch-project/opensearch-java/pull/1225))
 
 ### Deprecated
 - Deprecate RestClientTransport ([#536](https://github.com/opensearch-project/opensearch-java/pull/536))
diff --git a/java-client/src/main/java/org/opensearch/client/opensearch/core/msearch/MultisearchBody.java b/java-client/src/main/java/org/opensearch/client/opensearch/core/msearch/MultisearchBody.java
index fb4ff1013d..4ab4787a96 100644
--- a/java-client/src/main/java/org/opensearch/client/opensearch/core/msearch/MultisearchBody.java
+++ b/java-client/src/main/java/org/opensearch/client/opensearch/core/msearch/MultisearchBody.java
@@ -44,6 +44,7 @@
 import org.opensearch.client.json.ObjectBuilderDeserializer;
 import org.opensearch.client.json.ObjectDeserializer;
 import org.opensearch.client.json.PlainJsonSerializable;
+import org.opensearch.client.opensearch._types.FieldValue;
 import org.opensearch.client.opensearch._types.ScriptField;
 import org.opensearch.client.opensearch._types.SortOptions;
 import org.opensearch.client.opensearch._types.aggregations.Aggregation;
@@ -77,7 +78,7 @@ public class MultisearchBody implements PlainJsonSerializable {
     @Nullable
     private final Query postFilter;
 
-    private final List<String> searchAfter;
+    private final List<FieldValue> searchAfter;
 
     @Nullable
     private final Integer size;
@@ -202,7 +203,7 @@ public final Query postFilter() {
     /**
      * API name: {@code search_after}
      */
-    public final List<String> searchAfter() {
+    public final List<FieldValue> searchAfter() {
         return this.searchAfter;
     }
 
@@ -407,8 +408,8 @@ protected void serializeInternal(JsonGenerator generator, JsonpMapper mapper) {
         if (ApiTypeHelper.isDefined(this.searchAfter)) {
             generator.writeKey("search_after");
             generator.writeStartArray();
-            for (String item0 : this.searchAfter) {
-                generator.write(item0);
+            for (FieldValue item0 : this.searchAfter) {
+                item0.serialize(generator, mapper);
 
             }
             generator.writeEnd();
@@ -578,7 +579,7 @@ public static class Builder extends ObjectBuilderBase implements ObjectBuilder<M
         private Query postFilter;
 
         @Nullable
-        private List<String> searchAfter;
+        private List<FieldValue> searchAfter;
 
         @Nullable
         private Integer size;
@@ -716,7 +717,7 @@ public final Builder postFilter(Function<Query.Builder, ObjectBuilder<Query>> fn
          * <p>
          * Adds all elements of <code>list</code> to <code>searchAfter</code>.
          */
-        public final Builder searchAfter(List<String> list) {
+        public final Builder searchAfter(List<FieldValue> list) {
             this.searchAfter = _listAddAll(this.searchAfter, list);
             return this;
         }
@@ -726,7 +727,7 @@ public final Builder searchAfter(List<String> list) {
          * <p>
          * Adds one or more values to <code>searchAfter</code>.
          */
-        public final Builder searchAfter(String value, String... values) {
+        public final Builder searchAfter(FieldValue value, FieldValue... values) {
             this.searchAfter = _listAdd(this.searchAfter, value, values);
             return this;
         }
@@ -1092,7 +1093,7 @@ protected static void setupMultisearchBodyDeserializer(ObjectDeserializer<Multis
         op.add(Builder::from, JsonpDeserializer.integerDeserializer(), "from");
         op.add(Builder::minScore, JsonpDeserializer.doubleDeserializer(), "min_score");
         op.add(Builder::postFilter, Query._DESERIALIZER, "post_filter");
-        op.add(Builder::searchAfter, JsonpDeserializer.arrayDeserializer(JsonpDeserializer.stringDeserializer()), "search_after");
+        op.add(Builder::searchAfter, JsonpDeserializer.arrayDeserializer(FieldValue._DESERIALIZER), "search_after");
         op.add(Builder::size, JsonpDeserializer.integerDeserializer(), "size");
         op.add(Builder::sort, JsonpDeserializer.arrayDeserializer(SortOptions._DESERIALIZER), "sort");
         op.add(Builder::trackScores, JsonpDeserializer.booleanDeserializer(), "track_scores");
diff --git a/java-client/src/main/java/org/opensearch/client/opensearch/core/search/Hit.java b/java-client/src/main/java/org/opensearch/client/opensearch/core/search/Hit.java
index eb54fe101b..7d838b207d 100644
--- a/java-client/src/main/java/org/opensearch/client/opensearch/core/search/Hit.java
+++ b/java-client/src/main/java/org/opensearch/client/opensearch/core/search/Hit.java
@@ -46,6 +46,7 @@
 import org.opensearch.client.json.ObjectBuilderDeserializer;
 import org.opensearch.client.json.ObjectDeserializer;
 import org.opensearch.client.json.PlainJsonSerializable;
+import org.opensearch.client.opensearch._types.FieldValue;
 import org.opensearch.client.opensearch.core.explain.Explanation;
 import org.opensearch.client.util.ApiTypeHelper;
 import org.opensearch.client.util.ObjectBuilder;
@@ -98,7 +99,7 @@ public class Hit<TDocument> implements PlainJsonSerializable {
     @Nullable
     private final Long version;
 
-    private final List<String> sort;
+    private final List<FieldValue> sort;
 
     @Nullable
     private final JsonpSerializer<TDocument> tDocumentSerializer;
@@ -266,7 +267,7 @@ public final Long version() {
     /**
      * API name: {@code sort}
      */
-    public final List<String> sort() {
+    public final List<FieldValue> sort() {
         return this.sort;
     }
 
@@ -404,8 +405,8 @@ protected void serializeInternal(JsonGenerator generator, JsonpMapper mapper) {
         if (ApiTypeHelper.isDefined(this.sort)) {
             generator.writeKey("sort");
             generator.writeStartArray();
-            for (String item0 : this.sort) {
-                generator.write(item0);
+            for (FieldValue item0 : this.sort) {
+                item0.serialize(generator, mapper);
 
             }
             generator.writeEnd();
@@ -474,7 +475,7 @@ public static class Builder<TDocument> extends ObjectBuilderBase implements Obje
         private Long version;
 
         @Nullable
-        private List<String> sort;
+        private List<FieldValue> sort;
 
         @Nullable
         private JsonpSerializer<TDocument> tDocumentSerializer;
@@ -703,7 +704,7 @@ public final Builder<TDocument> version(@Nullable Long value) {
          * <p>
          * Adds all elements of <code>list</code> to <code>sort</code>.
          */
-        public final Builder<TDocument> sort(List<String> list) {
+        public final Builder<TDocument> sort(List<FieldValue> list) {
             this.sort = _listAddAll(this.sort, list);
             return this;
         }
@@ -713,7 +714,7 @@ public final Builder<TDocument> sort(List<String> list) {
          * <p>
          * Adds one or more values to <code>sort</code>.
          */
-        public final Builder<TDocument> sort(String value, String... values) {
+        public final Builder<TDocument> sort(FieldValue value, FieldValue... values) {
             this.sort = _listAdd(this.sort, value, values);
             return this;
         }
@@ -778,7 +779,7 @@ protected static <TDocument> void setupHitDeserializer(
         op.add(Builder::seqNo, JsonpDeserializer.longDeserializer(), "_seq_no");
         op.add(Builder::primaryTerm, JsonpDeserializer.longDeserializer(), "_primary_term");
         op.add(Builder::version, JsonpDeserializer.longDeserializer(), "_version");
-        op.add(Builder::sort, JsonpDeserializer.arrayDeserializer(JsonpDeserializer.stringOrNullDeserializer()), "sort");
+        op.add(Builder::sort, JsonpDeserializer.arrayDeserializer(FieldValue._DESERIALIZER), "sort");
 
     }
 
diff --git a/java-client/src/test/java11/org/opensearch/client/opensearch/integTest/AbstractMultiSearchRequestIT.java b/java-client/src/test/java11/org/opensearch/client/opensearch/integTest/AbstractMultiSearchRequestIT.java
index de43d9fe05..0d35a11f7e 100644
--- a/java-client/src/test/java11/org/opensearch/client/opensearch/integTest/AbstractMultiSearchRequestIT.java
+++ b/java-client/src/test/java11/org/opensearch/client/opensearch/integTest/AbstractMultiSearchRequestIT.java
@@ -179,7 +179,7 @@ public void shouldReturnMultiSearchesSearchAfter() throws Exception {
         assertEquals(1, response.responses().size());
         assertEquals(3, response.responses().get(0).result().hits().hits().size());
 
-        List<String> sorts = response.responses().get(0).result().hits().hits().get(1).sort();
+        List<FieldValue> sorts = response.responses().get(0).result().hits().hits().get(1).sort();
         RequestItem sortedAfterItemsQuery = createMSearchSortedFuzzyRequest(b -> b.searchAfter(sorts));
 
         MsearchResponse<ShopItem> response2 = sendMSearchRequest(index, List.of(sortedAfterItemsQuery));