diff --git a/modules/core/src/main/scala/fs2/kafka/AdminClientSettings.scala b/modules/core/src/main/scala/fs2/kafka/AdminClientSettings.scala
index 8cbfd2879..b29badbf6 100644
--- a/modules/core/src/main/scala/fs2/kafka/AdminClientSettings.scala
+++ b/modules/core/src/main/scala/fs2/kafka/AdminClientSettings.scala
@@ -231,6 +231,13 @@ object AdminClientSettings {
 
   }
 
+  @deprecated("use the overload that takes an argument for BootstrapServers", "2.0.0")
+  def apply: AdminClientSettings =
+    AdminClientSettingsImpl(
+      properties = Map.empty,
+      closeTimeout = 20.seconds
+    )
+
   def apply(bootstrapServers: String): AdminClientSettings =
     AdminClientSettingsImpl(
       properties = Map.empty,
diff --git a/modules/core/src/main/scala/fs2/kafka/package.scala b/modules/core/src/main/scala/fs2/kafka/package.scala
index 30d92d360..c25907772 100644
--- a/modules/core/src/main/scala/fs2/kafka/package.scala
+++ b/modules/core/src/main/scala/fs2/kafka/package.scala
@@ -130,6 +130,11 @@ package kafka {
 
   object TransactionalProducerRecords {
 
+    @deprecated("this is now an identity operation", "3.0.0-M5")
+    def apply[F[_], K, V](
+      chunk: Chunk[CommittableProducerRecords[F, K, V]]
+    ): Chunk[CommittableProducerRecords[F, K, V]] = chunk
+
     /**
       * Creates a new [[TransactionalProducerRecords]] for producing exactly one
       * [[CommittableProducerRecords]]
diff --git a/modules/vulcan/src/main/scala/fs2/kafka/vulcan/AvroSettings.scala b/modules/vulcan/src/main/scala/fs2/kafka/vulcan/AvroSettings.scala
index 202283423..bcd0102bc 100644
--- a/modules/vulcan/src/main/scala/fs2/kafka/vulcan/AvroSettings.scala
+++ b/modules/vulcan/src/main/scala/fs2/kafka/vulcan/AvroSettings.scala
@@ -104,6 +104,12 @@ sealed abstract class AvroSettings[F[_]] {
     writerSchema: Option[Schema]
   ): F[(KafkaAvroSerializer, SchemaRegistryClient)]
 
+  @deprecated("use the overload that takes an optional writer schema", "2.5.0-M3")
+  final def createAvroSerializer(
+    isKey: Boolean
+  ): F[(KafkaAvroSerializer, SchemaRegistryClient)] =
+    createAvroSerializer(isKey, writerSchema = None)
+
   /**
     * Creates a new [[AvroSettings]] instance with the specified function for creating
     * `KafkaAvroDeserializer`s from settings. The arguments are [[schemaRegistryClient]], `isKey`,
@@ -126,6 +132,16 @@ sealed abstract class AvroSettings[F[_]] {
     // format: on
   ): AvroSettings[F]
 
+  @deprecated("use the overload that has an `Option[Schema]` argument", "2.5.0-M3")
+  final def withCreateAvroSerializer(
+    // format: off
+    createAvroSerializerWith: (F[SchemaRegistryClient], Boolean, Map[String, String]) => F[(KafkaAvroSerializer, SchemaRegistryClient)]
+    // format: on
+  ): AvroSettings[F] =
+    withCreateAvroSerializer((client, isKey, _, properties) =>
+      createAvroSerializerWith(client, isKey, properties)
+    )
+
   /**
     * Creates a new [[AvroSettings]] instance with the specified function for registering schemas
     * from settings. The arguments are [[schemaRegistryClient]], `subject`, and `codec`.