diff --git a/src/main/java/seatsio/seasons/SeasonParams.java b/src/main/java/seatsio/seasons/SeasonParams.java
index 830323a..6297630 100644
--- a/src/main/java/seatsio/seasons/SeasonParams.java
+++ b/src/main/java/seatsio/seasons/SeasonParams.java
@@ -1,11 +1,14 @@
 package seatsio.seasons;
 
 import com.google.gson.JsonObject;
+import seatsio.charts.Category;
+import seatsio.charts.CategoryKey;
 import seatsio.events.Channel;
 import seatsio.events.ForSaleConfigParams;
 import seatsio.events.TableBookingConfig;
 
 import java.util.List;
+import java.util.Map;
 
 import static java.util.stream.Collectors.toList;
 
@@ -18,6 +21,8 @@ public abstract class SeasonParams<T extends  SeasonParams<?>> {
     private Integer numberOfEvents;
     private TableBookingConfig tableBookingConfig;
     private List<Channel> channels;
+    private Map<String, CategoryKey> objectCategories;
+    private List<Category> categories;
     private ForSaleConfigParams forSaleConfigParams;
     private Boolean forSalePropagated;
 
@@ -71,6 +76,31 @@ public T channels(List<Channel> channels) {
         return (T) this;
     }
 
+    public Map<String, CategoryKey> objectCategories() {
+        return objectCategories;
+    }
+
+    public T withObjectCategories(Map<String, CategoryKey> objectCategories) {
+        this.objectCategories = objectCategories;
+        return (T) this;
+    }
+
+    public List<JsonObject> categoriesAsJson() {
+        if (categories == null) {
+            return null;
+        }
+        return categories.stream().map(Category::toJson).collect(toList());
+    }
+
+    public List<Category> categories() {
+        return categories;
+    }
+
+    public T withCategories(List<Category> categories) {
+        this.categories = categories;
+        return (T) this;
+    }
+
     public T forSaleConfigParams(ForSaleConfigParams forSaleConfigParams) {
         this.forSaleConfigParams = forSaleConfigParams;
         return (T) this;
diff --git a/src/main/java/seatsio/seasons/Seasons.java b/src/main/java/seatsio/seasons/Seasons.java
index d3823cc..1767822 100644
--- a/src/main/java/seatsio/seasons/Seasons.java
+++ b/src/main/java/seatsio/seasons/Seasons.java
@@ -1,6 +1,7 @@
 package seatsio.seasons;
 
 import seatsio.SeatsioClient;
+import seatsio.charts.CategoryKey;
 import seatsio.events.Event;
 import seatsio.events.EventCreationResult;
 import seatsio.json.JsonObjectBuilder;
@@ -37,6 +38,8 @@ public Season create(String chartKey, CreateSeasonParams seasonParams) {
                 .withPropertyIfNotNull("numberOfEvents", seasonParams.numberOfEvents())
                 .withPropertyIfNotNull("tableBookingConfig", seasonParams.tableBookingConfig())
                 .withPropertyIfNotNull("channels", seasonParams.getChannelsAsJson())
+                .withPropertyIfNotNull("objectCategories", seasonParams.objectCategories(), CategoryKey::toJson)
+                .withPropertyIfNotNull("categories", seasonParams.categoriesAsJson())
                 .withPropertyIfNotNull("forSaleConfig", seasonParams.getForSaleConfigAsJson())
                 .withPropertyIfNotNull("forSalePropagated", seasonParams.forSalePropagated());
         String response = unirest.stringResponse(UnirestWrapper.post(baseUrl + "/seasons")
@@ -99,7 +102,9 @@ public void update(String eventKey, UpdateSeasonParams params) {
                 .withPropertyIfNotNull("eventKey", params.key())
                 .withPropertyIfNotNull("tableBookingConfig", params.tableBookingConfig())
                 .withPropertyIfNotNull("name", params.name())
-                .withPropertyIfNotNull("forSalePropagated", params.forSalePropagated());
+                .withPropertyIfNotNull("forSalePropagated", params.forSalePropagated())
+                .withPropertyIfNotNull("objectCategories", params.objectCategories(), CategoryKey::toJson)
+                .withPropertyIfNotNull("categories", params.categoriesAsJson());
         unirest.stringResponse(post(baseUrl + "/events/{key}")
                 .routeParam("key", eventKey)
                 .body(request.build().toString()));
diff --git a/src/test/java/seatsio/seasons/UpdateSeasonTest.java b/src/test/java/seatsio/seasons/UpdateSeasonTest.java
index 130eedf..a40e216 100644
--- a/src/test/java/seatsio/seasons/UpdateSeasonTest.java
+++ b/src/test/java/seatsio/seasons/UpdateSeasonTest.java
@@ -1,10 +1,14 @@
 package seatsio.seasons;
 
+import org.assertj.core.api.Assertions;
 import org.junit.jupiter.api.Test;
 import seatsio.SeatsioClientTest;
+import seatsio.charts.Category;
+import seatsio.charts.CategoryKey;
 import seatsio.charts.Chart;
 import seatsio.events.TableBookingConfig;
 
+import java.util.List;
 import java.util.Map;
 
 import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
@@ -48,6 +52,42 @@ public void updateTableBookingConfig() {
         assertThat(retrievedSeason.tableBookingConfig()).isEqualTo(newTableBookingConfig);
     }
 
+    @Test
+    public void updateObjectCategories() {
+        String chartKey = createTestChart();
+        Map<String, CategoryKey> objectCategories = Map.of(
+                "A-1", CategoryKey.of(9L)
+        );
+        Season season = client.seasons.create(chartKey, new CreateSeasonParams().withObjectCategories(objectCategories));
+
+        Map<String, CategoryKey> newObjectCategories = Map.of(
+                "A-2", CategoryKey.of(10L)
+        );
+        client.seasons.update(season.key(), new UpdateSeasonParams().withObjectCategories(newObjectCategories));
+
+        Season retrievedSeason = client.seasons.retrieve(season.key());
+        Assertions.assertThat(retrievedSeason.objectCategories()).isEqualTo(newObjectCategories);
+    }
+
+    @Test
+    public void updateCategories() {
+        String chartKey = createTestChart();
+        Season season = client.seasons.create(chartKey);
+
+        Category category = new Category("eventCategory", "event-level category", "#AAABBB");
+        List<Category> categories = List.of(
+                category
+        );
+
+        client.seasons.update(season.key(), new UpdateSeasonParams().withCategories(categories));
+
+        Season retrievedSeason = client.seasons.retrieve(season.key());
+        int numberOfCategoriesOnChart = 3; // see sampleChart.json
+        Assertions.assertThat(retrievedSeason.categories())
+                .hasSize(numberOfCategoriesOnChart + categories.size())
+                .contains(category);
+    }
+
     @Test
     public void updateForSalePropagated() {
         String chartKey = createTestChartWithTables();