diff --git a/.gitmodules b/.gitmodules
index e69de29b..8bc327c7 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "explorer"]
+	path = explorer
+	url = git@github.com:blockchain-jd-com/explorer.git
+[submodule "libs/bft-smart"]
+	path = libs/bft-smart
+	url = git@github.com:blockchain-jd-com/bftsmart.git
diff --git a/explorer b/explorer
new file mode 160000
index 00000000..f6e95c59
--- /dev/null
+++ b/explorer
@@ -0,0 +1 @@
+Subproject commit f6e95c5978742e44d28a4f5d1ceba58b97d319d9
diff --git a/libs/bft-smart b/libs/bft-smart
new file mode 160000
index 00000000..6b5b3c24
--- /dev/null
+++ b/libs/bft-smart
@@ -0,0 +1 @@
+Subproject commit 6b5b3c24353536ac6316ff8be1ffb186f8875a86