diff --git a/.gitmodules b/.gitmodules
index 6804e61e8c..1570bc4474 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -19,3 +19,6 @@
 [submodule "vendor/github.com/grpc-ecosystem/go-grpc-prometheus"]
 	path = vendor/github.com/grpc-ecosystem/go-grpc-prometheus
 	url = https://github.com/grpc-ecosystem/go-grpc-prometheus
+[submodule "vendor/github.com/ugorji/go"]
+	path = vendor/github.com/ugorji/go
+	url = https://github.com/ugorji/go
diff --git a/vendor/github.com/ugorji/go b/vendor/github.com/ugorji/go
new file mode 160000
index 0000000000..8c0409fcbb
--- /dev/null
+++ b/vendor/github.com/ugorji/go
@@ -0,0 +1 @@
+Subproject commit 8c0409fcbb70099c748d71f714529204975f6c3f