diff --git a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/rsocket/RSocketStrategiesAutoConfiguration.java b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/rsocket/RSocketStrategiesAutoConfiguration.java
index ef4dfadc63..7db6ddd28f 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/rsocket/RSocketStrategiesAutoConfiguration.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/rsocket/RSocketStrategiesAutoConfiguration.java
@@ -61,7 +61,7 @@ public class RSocketStrategiesAutoConfiguration {
 		RSocketStrategies.Builder builder = RSocketStrategies.builder();
 		builder.reactiveAdapterStrategy(ReactiveAdapterRegistry.getSharedInstance());
 		customizers.orderedStream().forEach((customizer) -> customizer.customize(builder));
-		builder.decoder(StringDecoder.textPlainOnly());
+		builder.decoder(StringDecoder.allMimeTypes());
 		builder.encoder(CharSequenceEncoder.allMimeTypes());
 		builder.dataBufferFactory(new NettyDataBufferFactory(PooledByteBufAllocator.DEFAULT));
 		return builder.build();
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/rsocket/RSocketMessagingAutoConfigurationTests.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/rsocket/RSocketMessagingAutoConfigurationTests.java
index bfb22af520..195550cd54 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/rsocket/RSocketMessagingAutoConfigurationTests.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/rsocket/RSocketMessagingAutoConfigurationTests.java
@@ -72,7 +72,7 @@ class RSocketMessagingAutoConfigurationTests {
 		@Bean
 		public RSocketStrategies rSocketStrategies() {
 			return RSocketStrategies.builder().encoder(CharSequenceEncoder.textPlainOnly())
-					.decoder(StringDecoder.textPlainOnly()).build();
+					.decoder(StringDecoder.allMimeTypes()).build();
 		}
 
 	}
@@ -84,7 +84,7 @@ class RSocketMessagingAutoConfigurationTests {
 		public RSocketMessageHandler customMessageHandler() {
 			RSocketMessageHandler messageHandler = new RSocketMessageHandler();
 			RSocketStrategies strategies = RSocketStrategies.builder().encoder(CharSequenceEncoder.textPlainOnly())
-					.decoder(StringDecoder.textPlainOnly()).build();
+					.decoder(StringDecoder.allMimeTypes()).build();
 			messageHandler.setRSocketStrategies(strategies);
 			return messageHandler;
 		}
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/rsocket/RSocketServerAutoConfigurationTests.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/rsocket/RSocketServerAutoConfigurationTests.java
index 5ba0849f0a..38f756ac56 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/rsocket/RSocketServerAutoConfigurationTests.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/rsocket/RSocketServerAutoConfigurationTests.java
@@ -101,7 +101,7 @@ class RSocketServerAutoConfigurationTests {
 		public RSocketMessageHandler messageHandler() {
 			RSocketMessageHandler messageHandler = new RSocketMessageHandler();
 			messageHandler.setRSocketStrategies(RSocketStrategies.builder().encoder(CharSequenceEncoder.textPlainOnly())
-					.decoder(StringDecoder.textPlainOnly()).build());
+					.decoder(StringDecoder.allMimeTypes()).build());
 			return messageHandler;
 		}