diff --git a/spring-boot-project/spring-boot-dependencies/build.gradle b/spring-boot-project/spring-boot-dependencies/build.gradle
index 2905f6824f2..e42337d0403 100644
--- a/spring-boot-project/spring-boot-dependencies/build.gradle
+++ b/spring-boot-project/spring-boot-dependencies/build.gradle
@@ -2378,7 +2378,7 @@ bom {
 			releaseNotes("https://github.com/spring-projects/spring-session/releases/tag/{version}")
 		}
 	}
-	library("Spring WS", "4.1.0-SNAPSHOT") {
+	library("Spring WS", "5.0.0-SNAPSHOT") {
 		considerSnapshots()
 		group("org.springframework.ws") {
 			bom("spring-ws-bom")
diff --git a/spring-boot-project/spring-boot-docs/src/main/kotlin/org/springframework/boot/docs/io/webservices/template/MyService.kt b/spring-boot-project/spring-boot-docs/src/main/kotlin/org/springframework/boot/docs/io/webservices/template/MyService.kt
index 16ce8bdaf30..fbd4415d381 100644
--- a/spring-boot-project/spring-boot-docs/src/main/kotlin/org/springframework/boot/docs/io/webservices/template/MyService.kt
+++ b/spring-boot-project/spring-boot-docs/src/main/kotlin/org/springframework/boot/docs/io/webservices/template/MyService.kt
@@ -30,7 +30,7 @@ class MyService(webServiceTemplateBuilder: WebServiceTemplateBuilder) {
 		webServiceTemplate = webServiceTemplateBuilder.build()
 	}
 
-	fun someWsCall(detailsReq: SomeRequest?): SomeResponse {
+	fun someWsCall(detailsReq: SomeRequest): SomeResponse {
 		return webServiceTemplate.marshalSendAndReceive(
 			detailsReq,
 			SoapActionCallback("https://ws.example.com/action")