diff --git a/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/instrument/web/client/TraceWebClientAutoConfiguration.java b/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/instrument/web/client/TraceWebClientAutoConfiguration.java
index 6af0ea18d..454b3e50e 100644
--- a/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/instrument/web/client/TraceWebClientAutoConfiguration.java
+++ b/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/instrument/web/client/TraceWebClientAutoConfiguration.java
@@ -109,7 +109,7 @@ public class TraceWebClientAutoConfiguration {
 			return new UserInfoRestTemplateCustomizerBPP(this.beanFactory);
 		}
 
-		class UserInfoRestTemplateCustomizerBPP implements BeanPostProcessor {
+		private static class UserInfoRestTemplateCustomizerBPP implements BeanPostProcessor {
 
 			private final BeanFactory beanFactory;