diff --git a/2.1.x/spring-cloud-sleuth.xml b/2.1.x/spring-cloud-sleuth.xml
index 414a72a65..521453926 100644
--- a/2.1.x/spring-cloud-sleuth.xml
+++ b/2.1.x/spring-cloud-sleuth.xml
@@ -4,7 +4,7 @@
 <book xmlns="http://docbook.org/ns/docbook" xmlns:xl="http://www.w3.org/1999/xlink" version="5.0" xml:lang="en">
 <info>
 <title>Spring Cloud Sleuth</title>
-<date>2019-12-30</date>
+<date>2019-12-31</date>
 <author>
 <personname>
 <firstname>Adrian Cole, Spencer Gibb, Marcin Grzejszczak, Dave Syer, Jay Bryant</firstname>