diff --git a/kafka-to-database/README.adoc b/kafka-to-database/README.adoc
index b55005b3..db4a3053 100644
--- a/kafka-to-database/README.adoc
+++ b/kafka-to-database/README.adoc
@@ -2,6 +2,13 @@
 Robin Moffatt <robin@confluent.io>
 v1.10, 11 March 2021
 
+See also: 
+
+* link:ksqldb-jdbc-sink.adoc[ksqlDB & Kafka Connect JDBC Sink in action]
+* https://rmoff.net/2021/03/12/kafka-connect-jdbc-sink-deep-dive-working-with-primary-keys/[Kafka Connect JDBC Sink deep-dive: Working with Primary Keys]
+
+''''
+
 🎥Video: https://rmoff.dev/kafka-jdbc-video
 
 _Tested with Confluent Platform 6.1, ksqlDB 0.15, Kafka Connect JDBC connector 5.5.3_
diff --git a/kafka-to-database/docker-compose.yml b/kafka-to-database/docker-compose.yml
index e4361b66..d38c8309 100644
--- a/kafka-to-database/docker-compose.yml
+++ b/kafka-to-database/docker-compose.yml
@@ -79,8 +79,6 @@ services:
       CONNECT_KEY_CONVERTER_SCHEMA_REGISTRY_URL: 'http://schema-registry:8081'
       CONNECT_VALUE_CONVERTER: io.confluent.connect.avro.AvroConverter
       CONNECT_VALUE_CONVERTER_SCHEMA_REGISTRY_URL: 'http://schema-registry:8081'
-      CONNECT_INTERNAL_KEY_CONVERTER: "org.apache.kafka.connect.json.JsonConverter"
-      CONNECT_INTERNAL_VALUE_CONVERTER: "org.apache.kafka.connect.json.JsonConverter"
       CONNECT_LOG4J_ROOT_LOGLEVEL: "INFO"
       CONNECT_LOG4J_LOGGERS: "org.apache.kafka.connect.runtime.rest=WARN,org.reflections=ERROR"
       CONNECT_CONFIG_STORAGE_REPLICATION_FACTOR: "1"