diff --git a/spring-cloud-stream/src/main/java/org/springframework/cloud/stream/config/ContentTypeConfiguration.java b/spring-cloud-stream/src/main/java/org/springframework/cloud/stream/config/ContentTypeConfiguration.java
index 4e509ec02..ff5ba0255 100644
--- a/spring-cloud-stream/src/main/java/org/springframework/cloud/stream/config/ContentTypeConfiguration.java
+++ b/spring-cloud-stream/src/main/java/org/springframework/cloud/stream/config/ContentTypeConfiguration.java
@@ -37,7 +37,7 @@ import org.springframework.messaging.converter.MessageConverter;
  */
 @Configuration
 @Role(BeanDefinition.ROLE_INFRASTRUCTURE)
-public class ContentTypeConfiguration {
+class ContentTypeConfiguration {
 
 	@Bean
 	public CompositeMessageConverterFactory compositeMessageConverterFactory(