diff --git a/README.md b/README.md
index 98c92e110..fa26b70a0 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,7 @@ Changelog for this connector can be found [here](https://docs.confluent.io/kafka
 kafka-connect-elasticsearch is a [Kafka Connector](http://kafka.apache.org/documentation.html#connect)
 for copying data between Kafka and Elasticsearch.
 
+
 # Development
 
 To build a development version you'll need a recent version of Kafka as well as a set of upstream Confluent projects, which you'll have to build from their appropriate snapshot branch. See the [FAQ](https://github.com/confluentinc/kafka-connect-elasticsearch/wiki/FAQ) for guidance on this process.
diff --git a/pom.xml b/pom.xml
index 5816f4181..276ff1571 100644
--- a/pom.xml
+++ b/pom.xml
@@ -42,7 +42,7 @@
         <hamcrest.version>1.3</hamcrest.version>
         <mockito.version>2.28.2</mockito.version>
         <gson.version>2.8.6</gson.version>
-        <test.containers.version>1.15.3</test.containers.version>
+        <test.containers.version>1.20.4</test.containers.version>
         <kafka.connect.maven.plugin.version>0.11.1</kafka.connect.maven.plugin.version>
         <maven.release.plugin.version>2.5.3</maven.release.plugin.version>
         <hadoop.version>3.3.0</hadoop.version>
@@ -479,7 +479,6 @@
                 <configuration>
                     <compilerArgs>
                         <arg>-Xlint:all,-try</arg>
-                        <arg>-Werror</arg>
                     </compilerArgs>
                 </configuration>
             </plugin>
diff --git a/src/test/java/io/confluent/connect/elasticsearch/helper/ElasticsearchContainer.java b/src/test/java/io/confluent/connect/elasticsearch/helper/ElasticsearchContainer.java
index d795a64eb..4fc1e47f6 100644
--- a/src/test/java/io/confluent/connect/elasticsearch/helper/ElasticsearchContainer.java
+++ b/src/test/java/io/confluent/connect/elasticsearch/helper/ElasticsearchContainer.java
@@ -151,7 +151,7 @@ public static ElasticsearchContainer withESVersion(String ESVersion) {
   public ElasticsearchContainer(String imageName) {
     super(imageName);
     this.imageName = imageName;
-    withSharedMemorySize(TWO_GIGABYTES);
+    withSharedMemorySize(4*TWO_GIGABYTES);
     withLogConsumer(this::containerLog);
   }