diff --git a/api/src/main/java/io/kafbat/ui/service/OffsetsResetService.java b/api/src/main/java/io/kafbat/ui/service/OffsetsResetService.java
index d2e376cf3..82af48423 100644
--- a/api/src/main/java/io/kafbat/ui/service/OffsetsResetService.java
+++ b/api/src/main/java/io/kafbat/ui/service/OffsetsResetService.java
@@ -2,9 +2,8 @@
 
 import static java.util.stream.Collectors.toMap;
 import static java.util.stream.Collectors.toSet;
-import static org.apache.kafka.common.ConsumerGroupState.DEAD;
-import static org.apache.kafka.common.ConsumerGroupState.EMPTY;
-
+import static org.apache.kafka.common.GroupState.DEAD;
+import static org.apache.kafka.common.GroupState.EMPTY;
 import com.google.common.base.Preconditions;
 import io.kafbat.ui.exception.NotFoundException;
 import io.kafbat.ui.exception.ValidationException;
@@ -104,13 +103,13 @@ private Mono<ReactiveAdminClient> checkGroupCondition(KafkaCluster cluster, Stri
                 .filter(cgs -> cgs.containsKey(groupId))
                 .map(cgs -> cgs.get(groupId))
                 .flatMap(cg -> {
-                  if (!Set.of(DEAD, EMPTY).contains(cg.state())) {
+                  if (!Set.of(DEAD, EMPTY).contains(cg.groupState())) {
                     return Mono.error(
                         new ValidationException(
                             String.format(
                                 "Group's offsets can be reset only if group is inactive,"
                                     + " but group is in %s state",
-                                cg.state()
+                                cg.groupState()
                             )
                         )
                     );
diff --git a/api/src/main/java/io/kafbat/ui/service/ReactiveAdminClient.java b/api/src/main/java/io/kafbat/ui/service/ReactiveAdminClient.java
index 5bb2775a3..cd44e0548 100644
--- a/api/src/main/java/io/kafbat/ui/service/ReactiveAdminClient.java
+++ b/api/src/main/java/io/kafbat/ui/service/ReactiveAdminClient.java
@@ -493,13 +493,9 @@ public Mono<Void> createPartitions(Map<String, NewPartitions> newPartitionsMap)
   // NOTE: places whole current topic config with new one. Entries that were present in old config,
   // but missed in new will be set to default
   public Mono<Void> updateTopicConfig(String topicName, Map<String, String> configs) {
-    if (getClusterFeatures().contains(SupportedFeature.INCREMENTAL_ALTER_CONFIGS)) {
       return getTopicsConfigImpl(List.of(topicName), false)
           .map(conf -> conf.getOrDefault(topicName, List.of()))
           .flatMap(currentConfigs -> incrementalAlterConfig(topicName, currentConfigs, configs));
-    } else {
-      return alterConfig(topicName, configs);
-    }
   }
 
   public Mono<List<String>> listConsumerGroupNames() {
@@ -742,16 +738,6 @@ private Mono<Void> incrementalAlterConfig(String topicName,
         )).all());
   }
 
-  @SuppressWarnings("deprecation")
-  private Mono<Void> alterConfig(String topicName, Map<String, String> configs) {
-    List<ConfigEntry> configEntries = configs.entrySet().stream()
-        .flatMap(cfg -> Stream.of(new ConfigEntry(cfg.getKey(), cfg.getValue())))
-        .collect(toList());
-    Config config = new Config(configEntries);
-    var topicResource = new ConfigResource(ConfigResource.Type.TOPIC, topicName);
-    return toMono(client.alterConfigs(Map.of(topicResource, config)).all());
-  }
-
   /**
    * Splits input collection into batches, converts each batch into Mono, sequentially subscribes to them
    * and merges output Monos into one Mono.
diff --git a/api/src/main/java/io/kafbat/ui/util/jsonschema/JsonAvroConversion.java b/api/src/main/java/io/kafbat/ui/util/jsonschema/JsonAvroConversion.java
index 76baf0072..9223f16a6 100644
--- a/api/src/main/java/io/kafbat/ui/util/jsonschema/JsonAvroConversion.java
+++ b/api/src/main/java/io/kafbat/ui/util/jsonschema/JsonAvroConversion.java
@@ -17,7 +17,6 @@
 import com.fasterxml.jackson.databind.node.TextNode;
 import com.google.common.collect.Lists;
 import io.confluent.kafka.schemaregistry.avro.AvroSchemaUtils;
-import io.confluent.kafka.serializers.AvroData;
 import io.kafbat.ui.exception.JsonAvroConversionException;
 import java.math.BigDecimal;
 import java.nio.ByteBuffer;
diff --git a/contract/src/main/resources/swagger/kafbat-ui-api.yaml b/contract/src/main/resources/swagger/kafbat-ui-api.yaml
index 77614253e..50c655a48 100644
--- a/contract/src/main/resources/swagger/kafbat-ui-api.yaml
+++ b/contract/src/main/resources/swagger/kafbat-ui-api.yaml
@@ -3872,6 +3872,7 @@ components:
         - DYNAMIC_CLIENT_METRICS_CONFIG
         - STATIC_BROKER_CONFIG
         - DEFAULT_CONFIG
+        - DYNAMIC_GROUP_CONFIG
         - UNKNOWN
 
     ConfigSynonym:
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 0a09c90a9..1b631baf4 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -13,8 +13,8 @@ apache-commons-compress = '1.26.0'
 assertj = '3.25.3'
 avro = '1.11.4'
 byte-buddy = '1.14.19'
-confluent = '7.9.0'
-confluent-ccs = '7.9.0-ccs'
+confluent = '8.0.0'
+confluent-ccs = '8.0.0-ccs'
 
 mapstruct = '1.6.2'
 lombok = '1.18.34'