diff --git a/applications/sink/elasticsearch-sink/pom.xml b/applications/sink/elasticsearch-sink/pom.xml
index 83ffd2ab..fa8c3196 100644
--- a/applications/sink/elasticsearch-sink/pom.xml
+++ b/applications/sink/elasticsearch-sink/pom.xml
@@ -33,19 +33,16 @@
         <dependency>
             <groupId>org.testcontainers</groupId>
             <artifactId>testcontainers</artifactId>
-            <version>${testcontainers.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.testcontainers</groupId>
             <artifactId>junit-jupiter</artifactId>
-            <version>${testcontainers.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.testcontainers</groupId>
             <artifactId>elasticsearch</artifactId>
-            <version>${testcontainers.version}</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
diff --git a/applications/sink/elasticsearch-sink/src/test/java/org/springframework/cloud/stream/app/sink/elasticsearch/ElasticsearchSinkTests.java b/applications/sink/elasticsearch-sink/src/test/java/org/springframework/cloud/stream/app/sink/elasticsearch/ElasticsearchSinkTests.java
index d3bf671b..e60a246f 100644
--- a/applications/sink/elasticsearch-sink/src/test/java/org/springframework/cloud/stream/app/sink/elasticsearch/ElasticsearchSinkTests.java
+++ b/applications/sink/elasticsearch-sink/src/test/java/org/springframework/cloud/stream/app/sink/elasticsearch/ElasticsearchSinkTests.java
@@ -32,14 +32,8 @@ import org.testcontainers.utility.DockerImageName;
 
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.test.context.runner.ApplicationContextRunner;
-import org.springframework.cloud.fn.consumer.elasticsearch.ElasticsearchConsumerConfiguration;
 import org.springframework.cloud.stream.binder.test.InputDestination;
 import org.springframework.cloud.stream.binder.test.TestChannelBinderConfiguration;
-import org.springframework.context.annotation.Configuration;
-import org.springframework.context.annotation.Import;
-import org.springframework.data.elasticsearch.client.ClientConfiguration;
-import org.springframework.data.elasticsearch.client.elc.ElasticsearchConfiguration;
-import org.springframework.lang.NonNull;
 import org.springframework.messaging.support.GenericMessage;
 
 
@@ -59,24 +53,20 @@ public class ElasticsearchSinkTests {
 	private final ApplicationContextRunner contextRunner = new ApplicationContextRunner()
 			.withUserConfiguration(TestChannelBinderConfiguration.getCompleteConfiguration(ElasticsearchSinkTestApplication.class));
 
-
 	@Test
 	void elasticSearchSinkWithIndexNameProperty() {
 		this.contextRunner
 				.withPropertyValues("spring.cloud.function.definition=elasticsearchConsumer",
 						"elasticsearch.consumer.index=foo", "elasticsearch.consumer.id=1",
-						"spring.elasticsearch.rest.uris=http://" + elasticsearch.getHttpHostAddress())
+						"spring.elasticsearch.uris=http://" + elasticsearch.getHttpHostAddress())
 				.run(context -> {
-
-					final InputDestination inputDestination = context.getBean(InputDestination.class);
-					final String jsonObject = "{\"age\":10,\"dateOfBirth\":1471466076564,"
+					InputDestination inputDestination = context.getBean(InputDestination.class);
+					String jsonObject = "{\"age\":10,\"dateOfBirth\":1471466076564,"
 							+ "\"fullName\":\"John Doe\"}";
-
 					inputDestination.send(new GenericMessage<>(jsonObject));
-
-					final ElasticsearchClient elasticsearchClient = context.getBean(ElasticsearchClient.class);
-					final GetRequest getRequest = new GetRequest.Builder().index("foo").id("1").build();
-					final GetResponse<JsonData> response = elasticsearchClient.get(getRequest, JsonData.class);
+					ElasticsearchClient elasticsearchClient = context.getBean(ElasticsearchClient.class);
+					GetRequest getRequest = new GetRequest.Builder().index("foo").id("1").build();
+					GetResponse<JsonData> response = elasticsearchClient.get(getRequest, JsonData.class);
 					assertThat(response.found()).isTrue();
 					assertThat(response.source()).isNotNull();
 					assertThat(response.source().toJson()).isEqualTo(JsonData.fromJson(jsonObject).toJson());
@@ -87,7 +77,7 @@ public class ElasticsearchSinkTests {
 	void elasticSearchSinkWithIndexNameFromHeader() {
 		this.contextRunner
 				.withPropertyValues("spring.cloud.function.definition=elasticsearchConsumer", "elasticsearch.consumer.id=1",
-						"spring.elasticsearch.rest.uris=http://" + elasticsearch.getHttpHostAddress())
+						"spring.elasticsearch.uris=http://" + elasticsearch.getHttpHostAddress())
 				.run(context -> {
 
 					final InputDestination inputDestination = context.getBean(InputDestination.class);
@@ -106,19 +96,7 @@ public class ElasticsearchSinkTests {
 	}
 
 	@SpringBootApplication
-	@Import(ElasticsearchConsumerConfiguration.class)
 	static class ElasticsearchSinkTestApplication {
 	}
 
-	@Configuration(proxyBeanMethods = false)
-	static class Config extends ElasticsearchConfiguration {
-		@NonNull
-		@Override
-		public ClientConfiguration clientConfiguration() {
-			return ClientConfiguration.builder()
-				.connectedTo(elasticsearch.getHttpHostAddress())
-				.build();
-		}
-	}
-
 }
diff --git a/applications/sink/mqtt-sink/pom.xml b/applications/sink/mqtt-sink/pom.xml
index 80c44c21..8c987572 100644
--- a/applications/sink/mqtt-sink/pom.xml
+++ b/applications/sink/mqtt-sink/pom.xml
@@ -22,7 +22,6 @@
         <dependency>
             <groupId>org.testcontainers</groupId>
             <artifactId>testcontainers</artifactId>
-            <version>${testcontainers.version}</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
diff --git a/applications/sink/redis-sink/pom.xml b/applications/sink/redis-sink/pom.xml
index b99a65c1..47235808 100644
--- a/applications/sink/redis-sink/pom.xml
+++ b/applications/sink/redis-sink/pom.xml
@@ -23,19 +23,16 @@
 		<dependency>
 			<groupId>org.testcontainers</groupId>
 			<artifactId>testcontainers</artifactId>
-            <version>${testcontainers.version}</version>
 			<scope>test</scope>
 		</dependency>
         <dependency>
             <groupId>org.testcontainers</groupId>
             <artifactId>junit-jupiter</artifactId>
-            <version>${testcontainers.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.springframework.cloud</groupId>
             <artifactId>spring-cloud-starter-bootstrap</artifactId>
-            <version>${spring-cloud-starters.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
diff --git a/applications/source/debezium-source/src/test/java/org/springframework/cloud/stream/app/source/debezium/integration/DebeziumSupplierAvroFormatTest.java b/applications/source/debezium-source/src/test/java/org/springframework/cloud/stream/app/source/debezium/integration/DebeziumSupplierAvroFormatTest.java
deleted file mode 100644
index fe8df20e..00000000
--- a/applications/source/debezium-source/src/test/java/org/springframework/cloud/stream/app/source/debezium/integration/DebeziumSupplierAvroFormatTest.java
+++ /dev/null
@@ -1,121 +0,0 @@
-/*
- * Copyright 2023-2023 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.springframework.cloud.stream.app.source.debezium.integration;
-
-import java.time.Duration;
-import java.util.List;
-
-import org.junit.jupiter.api.Tag;
-import org.junit.jupiter.api.Test;
-import org.testcontainers.containers.GenericContainer;
-import org.testcontainers.junit.jupiter.Container;
-import org.testcontainers.junit.jupiter.Testcontainers;
-
-import org.springframework.boot.WebApplicationType;
-import org.springframework.boot.builder.SpringApplicationBuilder;
-import org.springframework.cloud.stream.binder.test.OutputDestination;
-import org.springframework.cloud.stream.binder.test.TestChannelBinderConfiguration;
-import org.springframework.context.ConfigurableApplicationContext;
-import org.springframework.messaging.Message;
-
-import static org.assertj.core.api.Assertions.assertThat;
-
-/**
- * @author Christian Tzolov
- */
-@Tag("integration")
-@Testcontainers
-public class DebeziumSupplierAvroFormatTest {
-
-	// E.g. docker run -it --rm --name apicurio -p 8080:8080 apicurio/apicurio-registry-mem:2.4.1.Final
-	@Container
-	static GenericContainer<?> apicurio = new GenericContainer<>("apicurio/apicurio-registry-mem:2.4.1.Final")
-			.withExposedPorts(8080)
-			.withStartupTimeout(Duration.ofSeconds(120))
-			.withStartupAttempts(3);
-
-	@Container
-	static GenericContainer<?> debeziumMySQL = new GenericContainer<>(DebeziumTestUtils.DEBEZIUM_EXAMPLE_MYSQL_IMAGE)
-			.withEnv("MYSQL_ROOT_PASSWORD", "debezium")
-			.withEnv("MYSQL_USER", "mysqluser")
-			.withEnv("MYSQL_PASSWORD", "mysqlpw")
-			.withExposedPorts(3306)
-			.withStartupTimeout(Duration.ofSeconds(120))
-			.withStartupAttempts(3);
-
-	private final SpringApplicationBuilder applicationBuilder = new SpringApplicationBuilder(
-			TestChannelBinderConfiguration.getCompleteConfiguration(TestDebeziumSourceApplication.class))
-			.web(WebApplicationType.NONE)
-			.properties(
-					"spring.cloud.function.definition=debeziumSupplier",
-
-					"debezium.payloadFormat=AVRO",
-
-					"debezium.properties.key.converter=io.apicurio.registry.utils.converter.AvroConverter",
-					"debezium.properties.key.converter.apicurio.registry.auto-register=true",
-					"debezium.properties.key.converter.apicurio.registry.find-latest=true",
-					"debezium.properties.value.converter=io.apicurio.registry.utils.converter.AvroConverter",
-					"debezium.properties.value.converter.apicurio.registry.auto-register=true",
-					"debezium.properties.value.converter.apicurio.registry.find-latest=true",
-					"debezium.properties.schema.name.adjustment.mode=avro",
-
-					"debezium.properties.schema.history.internal=io.debezium.relational.history.MemorySchemaHistory",
-					"debezium.properties.offset.storage=org.apache.kafka.connect.storage.MemoryOffsetBackingStore",
-
-					"debezium.properties.topic.prefix=my-topic",
-					"debezium.properties.name=my-connector",
-					"debezium.properties.database.server.id=85744",
-
-					"debezium.properties.connector.class=io.debezium.connector.mysql.MySqlConnector",
-					"debezium.properties.database.user=debezium",
-					"debezium.properties.database.password=dbz",
-					"debezium.properties.database.hostname=localhost",
-
-					// JdbcTemplate configuration
-					String.format("app.datasource.url=jdbc:mysql://localhost:%d/%s?enabledTLSProtocols=TLSv1.2",
-							debeziumMySQL.getMappedPort(3306), DebeziumTestUtils.DATABASE_NAME),
-					"app.datasource.username=root",
-					"app.datasource.password=debezium",
-					"app.datasource.driver-class-name=com.mysql.cj.jdbc.Driver",
-					"app.datasource.type=com.zaxxer.hikari.HikariDataSource");
-
-	@Test
-	public void mysqlWithAvroContentFormat() {
-
-		String MYSQL_MAPPED_PORT = String.valueOf(debeziumMySQL.getMappedPort(3306));
-		String APICURIO_URL = "http://localhost:" + String.valueOf(apicurio.getMappedPort(8080)) + "/apis/registry/v2";
-
-		try (ConfigurableApplicationContext context = applicationBuilder.run(
-				"--debezium.properties.key.converter.apicurio.registry.url=" + APICURIO_URL,
-				"--debezium.properties.value.converter.apicurio.registry.url=" + APICURIO_URL,
-				"--debezium.properties.database.port=" + MYSQL_MAPPED_PORT)) {
-
-			OutputDestination outputDestination = context.getBean(OutputDestination.class);
-
-			// Using local region here
-			List<Message<?>> messages = DebeziumTestUtils.receiveAll(outputDestination);
-
-			assertThat(messages).isNotNull();
-			// Message size should correspond to the number of insert statements in the sample inventor DB
-			// configured by:
-			// https://github.com/debezium/container-images/blob/main/examples/mysql/2.1/inventory.sql
-			assertThat(messages).hasSizeGreaterThanOrEqualTo(52);
-			// assertThat(messages).map(message ->
-			// message.getHeaders().get("contentType")).isEqualTo("application/avro"); // TEST utils bug.
-		}
-	}
-}
diff --git a/applications/source/mqtt-source/pom.xml b/applications/source/mqtt-source/pom.xml
index d63afa6f..6fdc46fc 100644
--- a/applications/source/mqtt-source/pom.xml
+++ b/applications/source/mqtt-source/pom.xml
@@ -22,7 +22,6 @@
         <dependency>
             <groupId>org.testcontainers</groupId>
             <artifactId>testcontainers</artifactId>
-            <version>${testcontainers.version}</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
diff --git a/applications/source/websocket-source/src/test/java/org/springframework/cloud/stream/app/source/websocket/WebsocketSourceTests.java b/applications/source/websocket-source/src/test/java/org/springframework/cloud/stream/app/source/websocket/WebsocketSourceTests.java
index c9472142..e7f9fd0d 100644
--- a/applications/source/websocket-source/src/test/java/org/springframework/cloud/stream/app/source/websocket/WebsocketSourceTests.java
+++ b/applications/source/websocket-source/src/test/java/org/springframework/cloud/stream/app/source/websocket/WebsocketSourceTests.java
@@ -18,6 +18,7 @@ package org.springframework.cloud.stream.app.source.websocket;
 
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
+import java.util.Base64;
 import java.util.function.Supplier;
 
 import org.junit.jupiter.api.Test;
@@ -37,7 +38,6 @@ import org.springframework.http.HttpHeaders;
 import org.springframework.integration.websocket.ClientWebSocketContainer;
 import org.springframework.messaging.Message;
 import org.springframework.test.annotation.DirtiesContext;
-import org.springframework.util.Base64Utils;
 import org.springframework.web.socket.TextMessage;
 import org.springframework.web.socket.WebSocketSession;
 import org.springframework.web.socket.client.standard.StandardWebSocketClient;
@@ -73,7 +73,7 @@ public class WebsocketSourceTests {
 						this.properties.getPath());
 
 		HttpHeaders httpHeaders = new HttpHeaders();
-		String token = Base64Utils.encodeToString(
+		String token = Base64.getEncoder().encodeToString(
 				(this.securityProperties.getUser().getName() + ":" + this.securityProperties.getUser().getPassword())
 						.getBytes(StandardCharsets.UTF_8));
 		httpHeaders.set(HttpHeaders.AUTHORIZATION, "Basic " + token);
diff --git a/applications/stream-applications-core/pom.xml b/applications/stream-applications-core/pom.xml
index c5a578d5..59e569e1 100644
--- a/applications/stream-applications-core/pom.xml
+++ b/applications/stream-applications-core/pom.xml
@@ -17,7 +17,7 @@
 
     <properties>
         <stream-apps-core.version>6.0.0-SNAPSHOT</stream-apps-core.version>
-        <java-functions.version>5.0.1</java-functions.version>
+        <java-functions.version>5.1.0-SNAPSHOT</java-functions.version>
         <prometheus-rsocket.version>1.5.3</prometheus-rsocket.version>
         <spring-cloud-dataflow-apps-generator-plugin.version>1.1.0-SNAPSHOT</spring-cloud-dataflow-apps-generator-plugin.version>
         <spring-cloud-dataflow-apps-docs-plugin.version>1.1.0-SNAPSHOT</spring-cloud-dataflow-apps-docs-plugin.version>
@@ -42,38 +42,12 @@
                 <version>${java-functions.version}</version>
                 <type>pom</type>
                 <scope>import</scope>
-            </dependency>
-            <dependency>
-                <groupId>org.springframework.cloud</groupId>
-                <artifactId>spring-cloud-function-dependencies</artifactId>
-                <version>${spring-cloud-function.version}</version>
-            </dependency>
-            <dependency>
-                <groupId>org.springframework.cloud</groupId>
-                <artifactId>spring-cloud-stream-dependencies</artifactId>
-                <version>${spring-cloud-stream-dependencies.version}</version>
-                <type>pom</type>
-                <scope>import</scope>
             </dependency>
 			<dependency>
 				<groupId>org.mock-server</groupId>
 				<artifactId>mockserver-netty</artifactId>
 				<version>${mockserver.version}</version>
 			</dependency>
-            <dependency>
-                <groupId>org.junit</groupId>
-                <artifactId>junit-bom</artifactId>
-                <version>5.9.3</version>
-                <type>pom</type>
-                <scope>import</scope>
-            </dependency>
-            <dependency>
-                <groupId>org.testcontainers</groupId>
-                <artifactId>testcontainers-bom</artifactId>
-                <version>${testcontainers.version}</version>
-                <type>pom</type>
-                <scope>import</scope>
-            </dependency>
         </dependencies>
     </dependencyManagement>
 
@@ -169,17 +143,6 @@
                                 </metadata>
                                 <maven>
                                     <dependencyManagement>
-                                        <!-- Temporarily override SC-Fn dependency by giving it the highest precedence since 2020.0.5 release of spring-cloud will not take place until December -->
-                                        <dependency>
-                                            <groupId>org.springframework.cloud</groupId>
-                                            <artifactId>spring-cloud-function-dependencies</artifactId>
-                                            <version>${spring-cloud-function.version}</version>
-                                        </dependency>
-                                        <dependency>
-                                            <groupId>org.springframework.cloud</groupId>
-                                            <artifactId>spring-cloud-stream-dependencies</artifactId>
-                                            <version>${spring-cloud-stream-dependencies.version}</version>
-                                        </dependency>
                                         <dependency>
                                             <groupId>org.springframework.cloud</groupId>
                                             <artifactId>spring-cloud-dependencies</artifactId>
diff --git a/applications/stream-applications-integration-tests/pom.xml b/applications/stream-applications-integration-tests/pom.xml
index bcd497d5..10d02cbd 100644
--- a/applications/stream-applications-integration-tests/pom.xml
+++ b/applications/stream-applications-integration-tests/pom.xml
@@ -101,7 +101,6 @@
 		<dependency>
 			<groupId>org.testcontainers</groupId>
 			<artifactId>localstack</artifactId>
-			<version>${testcontainers.version}</version>
 		</dependency>
 	</dependencies>
 
diff --git a/stream-applications-build/pom.xml b/stream-applications-build/pom.xml
index 173524c5..101356e1 100644
--- a/stream-applications-build/pom.xml
+++ b/stream-applications-build/pom.xml
@@ -35,26 +35,26 @@
         <nohttp-checkstyle.version>0.0.11</nohttp-checkstyle.version>
         <disable.nohttp.checks>true</disable.nohttp.checks>
         <spring-javaformat-checkstyle.version>0.0.43</spring-javaformat-checkstyle.version>
-        <spring-boot.version>3.3.6</spring-boot.version>
-        <spring.version>6.1.15</spring.version>
-        <spring-cloud.version>2023.0.4</spring-cloud.version>
-        <spring-cloud-starters.version>4.1.5</spring-cloud-starters.version>
-        <spring-cloud-function.version>4.1.4</spring-cloud-function.version>
-        <spring-cloud-stream-dependencies.version>4.1.4</spring-cloud-stream-dependencies.version>
-        <testcontainers.version>1.19.8</testcontainers.version>
+        <spring-boot.version>3.4.2-SNAPSHOT</spring-boot.version>
+        <spring-cloud.version>2024.0.1-SNAPSHOT</spring-cloud.version>
+        <!-- =================================================================== -->
+        <!-- Required only for release train docs generation in -->
+        <!-- /stream-applications-release-train/stream-applications-docs/pom.xml -->
+        <spring.version>6.2.1</spring.version>
+        <spring-cloud-stream-dependencies.version>4.2.1-SNAPSHOT</spring-cloud-stream-dependencies.version>
+        <!-- =================================================================== -->
         <mockserver.version>5.15.0</mockserver.version>
-        <groovy.version>4.0.24</groovy.version>
         <apache-ivy.version>2.5.2</apache-ivy.version>
-        <jakarta-jms.version>3.1.0</jakarta-jms.version>
         <curator.version>5.5.0</curator.version>
         <mavenThreads>1</mavenThreads>
         <commons-compress.version>1.26.2</commons-compress.version>
         <commons-lang3.version>3.17.0</commons-lang3.version>
-		<!--suppress UnresolvedMavenProperty -->
-		<buildName>${env.BUILD_NAME}</buildName>
-		<!--suppress UnresolvedMavenProperty -->
-		<buildNumber>${env.BUILD_NUMBER}</buildNumber>
-	</properties>
+        <okhttp3.version>4.12.0</okhttp3.version>
+        <!--suppress UnresolvedMavenProperty -->
+        <buildName>${env.BUILD_NAME}</buildName>
+        <!--suppress UnresolvedMavenProperty -->
+        <buildNumber>${env.BUILD_NUMBER}</buildNumber>
+    </properties>
 
     <url>https://spring.io/projects/spring-cloud-stream-applications</url>
     <developers>
@@ -82,12 +82,6 @@
                 <artifactId>commons-lang3</artifactId>
                 <version>${commons-lang3.version}</version>
             </dependency>
-            <dependency>
-                <groupId>org.springframework</groupId>
-                <artifactId>spring-framework-bom</artifactId>
-                <version>${spring.version}</version>
-                <type>pom</type>
-            </dependency>
             <dependency>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-dependencies</artifactId>
@@ -102,37 +96,18 @@
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
-            <dependency>
-                <groupId>org.springframework.cloud</groupId>
-                <artifactId>spring-cloud-function-dependencies</artifactId>
-                <version>${spring-cloud-function.version}</version>
-                <scope>import</scope>
-                <type>pom</type>
-            </dependency>
-            <dependency>
-                <groupId>org.testcontainers</groupId>
-                <artifactId>testcontainers-bom</artifactId>
-                <version>${testcontainers.version}</version>
-                <type>pom</type>
-                <scope>import</scope>
-            </dependency>
-            <dependency>
-                <groupId>org.apache.groovy</groupId>
-                <artifactId>groovy-bom</artifactId>
-                <version>${groovy.version}</version>
-                <type>pom</type>
-                <scope>import</scope>
-            </dependency>
-            <dependency>
-                <groupId>jakarta.jms</groupId>
-                <artifactId>jakarta.jms-api</artifactId>
-                <version>${jakarta-jms.version}</version>
-            </dependency>
             <dependency>
                 <groupId>org.apache.ivy</groupId>
                 <artifactId>ivy</artifactId>
                 <version>${apache-ivy.version}</version>
             </dependency>
+            <dependency>
+                <groupId>com.squareup.okhttp3</groupId>
+                <artifactId>okhttp-bom</artifactId>
+                <version>${okhttp3.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
         </dependencies>
     </dependencyManagement>