diff --git a/spring-boot-project/spring-boot-docs/build.gradle b/spring-boot-project/spring-boot-docs/build.gradle
index 988493520d..ea344591b3 100644
--- a/spring-boot-project/spring-boot-docs/build.gradle
+++ b/spring-boot-project/spring-boot-docs/build.gradle
@@ -194,10 +194,8 @@ task aggregatedJavadoc(type: Javadoc) {
 		options {
 			author = true
 			docTitle = "Spring Boot ${project.version} API"
-			encoding = "UTF-8"
 			memberLevel = "protected"
 			outputLevel = "quiet"
-			source = "1.8"
 			splitIndex = true
 			use = true
 			windowTitle = "Spring Boot ${project.version} API"