diff --git a/src/main/java/com/meilisearch/sdk/model/IndexStats.java b/src/main/java/com/meilisearch/sdk/model/IndexStats.java
index fffbded5..756b35e0 100644
--- a/src/main/java/com/meilisearch/sdk/model/IndexStats.java
+++ b/src/main/java/com/meilisearch/sdk/model/IndexStats.java
@@ -1,7 +1,9 @@
 package com.meilisearch.sdk.model;
 
+import com.fasterxml.jackson.annotation.JsonProperty;
 import java.util.Map;
 import lombok.Getter;
+import lombok.Setter;
 
 /**
  * Stats data structure of a Meilisearch Index
@@ -10,6 +12,7 @@
  *     specification</a>
  */
 @Getter
+@Setter
 public class IndexStats {
     protected long numberOfDocuments;
     protected boolean isIndexing;
@@ -18,6 +21,8 @@ public class IndexStats {
     protected long avgDocumentSize;
     protected long numberOfEmbeddedDocuments;
     protected long numberOfEmbeddings;
+    protected long indexSize;
+    protected long usedIndexSize;
 
     public IndexStats() {}
 
@@ -29,6 +34,28 @@ public IndexStats(
             long avgDocumentSize,
             long numberOfEmbeddedDocuments,
             long numberOfEmbeddings) {
+        this(
+                numberOfDocuments,
+                isIndexing,
+                fieldDistribution,
+                rawDocumentDbSize,
+                avgDocumentSize,
+                numberOfEmbeddedDocuments,
+                numberOfEmbeddings,
+                0L,
+                0L);
+    }
+
+    public IndexStats(
+            long numberOfDocuments,
+            boolean isIndexing,
+            Map<String, Integer> fieldDistribution,
+            long rawDocumentDbSize,
+            long avgDocumentSize,
+            long numberOfEmbeddedDocuments,
+            long numberOfEmbeddings,
+            long indexSize,
+            long usedIndexSize) {
         this.numberOfDocuments = numberOfDocuments;
         this.isIndexing = isIndexing;
         this.fieldDistribution = fieldDistribution;
@@ -36,5 +63,12 @@ public IndexStats(
         this.avgDocumentSize = avgDocumentSize;
         this.numberOfEmbeddedDocuments = numberOfEmbeddedDocuments;
         this.numberOfEmbeddings = numberOfEmbeddings;
+        this.indexSize = indexSize;
+        this.usedIndexSize = usedIndexSize;
+    }
+
+    @JsonProperty("isIndexing")
+    public boolean isIndexing() {
+        return isIndexing;
     }
 }
diff --git a/src/test/java/com/meilisearch/sdk/json/GsonJsonHandlerTest.java b/src/test/java/com/meilisearch/sdk/json/GsonJsonHandlerTest.java
index 5de9593b..3cfaf7c9 100644
--- a/src/test/java/com/meilisearch/sdk/json/GsonJsonHandlerTest.java
+++ b/src/test/java/com/meilisearch/sdk/json/GsonJsonHandlerTest.java
@@ -291,6 +291,20 @@ void granularFilterableAttributesWithNullPatternRoundTrip() throws Exception {
         assertThat(decoded[0].getAttributePatterns(), arrayContaining("director", null, "genres"));
     }
 
+    @Test
+    void decodeIndexStatsWithIndexSizeAndUsedIndexSize() {
+        String json =
+                "{\"numberOfDocuments\":10,\"isIndexing\":false,\"fieldDistribution\":{},\"rawDocumentDbSize\":1024,\"avgDocumentSize\":102,\"numberOfEmbeddedDocuments\":0,\"numberOfEmbeddings\":0,\"indexSize\":2048,\"usedIndexSize\":1500}";
+
+        com.meilisearch.sdk.model.IndexStats indexStats =
+                classToTest.decode(json, com.meilisearch.sdk.model.IndexStats.class);
+
+        assertThat(indexStats, is(notNullValue()));
+        assertThat(indexStats.getNumberOfDocuments(), is(equalTo(10L)));
+        assertThat(indexStats.getIndexSize(), is(equalTo(2048L)));
+        assertThat(indexStats.getUsedIndexSize(), is(equalTo(1500L)));
+    }
+
     @Getter
     private static class Container {
         private Key key;
diff --git a/src/test/java/com/meilisearch/sdk/json/JacksonJsonHandlerTest.java b/src/test/java/com/meilisearch/sdk/json/JacksonJsonHandlerTest.java
index c30235b4..2479777d 100644
--- a/src/test/java/com/meilisearch/sdk/json/JacksonJsonHandlerTest.java
+++ b/src/test/java/com/meilisearch/sdk/json/JacksonJsonHandlerTest.java
@@ -178,4 +178,32 @@ void settingsWithAdvancedGranularFilterableAttributesRoundTripWithCustomMapper()
                         .getComparison(),
                 is(false));
     }
+
+    @Test
+    void decodeIndexStatsWithIndexSizeAndUsedIndexSize() throws Exception {
+        String json =
+                "{\"numberOfDocuments\":10,\"isIndexing\":false,\"fieldDistribution\":{},\"rawDocumentDbSize\":1024,\"avgDocumentSize\":102,\"numberOfEmbeddedDocuments\":0,\"numberOfEmbeddings\":0,\"indexSize\":2048,\"usedIndexSize\":1500}";
+
+        com.meilisearch.sdk.model.IndexStats indexStats =
+                classToTest.decode(json, com.meilisearch.sdk.model.IndexStats.class);
+
+        assertThat(indexStats, is(notNullValue()));
+        assertThat(indexStats.getNumberOfDocuments(), is(equalTo(10L)));
+        assertThat(indexStats.getIndexSize(), is(equalTo(2048L)));
+        assertThat(indexStats.getUsedIndexSize(), is(equalTo(1500L)));
+    }
+
+    @Test
+    void serializeIndexStats() throws Exception {
+        com.meilisearch.sdk.model.IndexStats indexStats =
+                new com.meilisearch.sdk.model.IndexStats(
+                        10, false, new java.util.HashMap<>(), 1024, 102, 0, 0, 2048, 1500);
+
+        String json = classToTest.encode(indexStats);
+
+        assertThat(json, org.hamcrest.Matchers.containsString("\"isIndexing\":false"));
+        assertThat(
+                json,
+                org.hamcrest.Matchers.not(org.hamcrest.Matchers.containsString("\"indexing\"")));
+    }
 }