- add design document URL to README.md
diff --git a/README.md b/README.md
index da352b1..c5a34ff 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,8 @@
# swarm
Swarm Synchronizer for XOS
-## Docker Swarm Controller Proposal
- https://docs.google.com/document/d/1xaGwVbhslnGnUmniztsfC099IMxTxG-eRDeruitda3E/edit
+You can get more information of Swarm Synchronizer from the following documents
+## Document - Docker Swarm Controller Proposal
+ https://docs.google.com/document/d/1xaGwVbhslnGnUmniztsfC099IMxTxG-eRDeruitda3E
+## Document - Swarm Synchronizer Design
+ https://docs.google.com/document/d/1vNNO2DwwJVuvfl2Xz6SBYx_vDGdd42ZRJQmOT6MdFIE