diff --git a/docs/src/main/asciidoc/README.adoc b/docs/src/main/asciidoc/README.adoc
index d973af4..1239ce0 100644
--- a/docs/src/main/asciidoc/README.adoc
+++ b/docs/src/main/asciidoc/README.adoc
@@ -8,8 +8,8 @@ include::install.adoc[]
 
 == Building
 
-include::https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/master/docs/src/main/asciidoc/building.adoc[]
+include::https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/3.1.x/docs/src/main/asciidoc/building.adoc[]
 
 == Contributing
 
-include::https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/master/docs/src/main/asciidoc/contributing.adoc[]
+include::https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/3.1.x/docs/src/main/asciidoc/contributing.adoc[]