diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 00000000..7402451f
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "packages/base/node-acme-client"]
+	path = packages/base/node-acme-client
+	url = https://github.com/certd/node-acme-client.git
diff --git a/packages/base/node-acme-client b/packages/base/node-acme-client
new file mode 160000
index 00000000..a62c144a
--- /dev/null
+++ b/packages/base/node-acme-client
@@ -0,0 +1 @@
+Subproject commit a62c144acc7200d64ce7f2676efb47cac6d1f4bd