diff --git a/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/ServerProperties.java b/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/ServerProperties.java
index eeda381f9ad..4c827d890a8 100644
--- a/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/ServerProperties.java
+++ b/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/ServerProperties.java
@@ -56,7 +56,7 @@ import org.springframework.util.StringUtils;
  * @author Andy Wilkinson
  * @author Ivan Sopov
  */
-@ConfigurationProperties(prefix = "server", ignoreUnknownFields = false)
+@ConfigurationProperties(prefix = "server", ignoreUnknownFields = true)
 public class ServerProperties implements EmbeddedServletContainerCustomizer, Ordered {
 
 	/**