diff --git a/.gitmodules b/.gitmodules
index ece9d0f3d3..715bac31f5 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -10,7 +10,7 @@
 	path = tests/src/gopkg.in/yaml.v2
 	url = https://github.com/go-yaml/yaml.git
 	branch = a5b47d31c556af34a302ce5d659e6fea44d90de0
-
 [submodule "samples/library"]
 	path = samples/library
 	url = https://github.com/docker-library/docs.git
+	branch = master