diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000000..053f00a6fb
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "zlib"]
+	path = zlib
+	url = https://github.com/madler/zlib.git
+[submodule "nanopass"]
+	path = nanopass
+	url = https://github.com/nanopass/nanopass-framework-scheme.git
diff --git a/nanopass b/nanopass
new file mode 160000
index 0000000000..221eecb965
--- /dev/null
+++ b/nanopass
@@ -0,0 +1 @@
+Subproject commit 221eecb965d9dfacccd97d1cb73f2a31c4119d3a
diff --git a/zlib b/zlib
new file mode 160000
index 0000000000..5089329162
--- /dev/null
+++ b/zlib
@@ -0,0 +1 @@
+Subproject commit 50893291621658f355bc5b4d450a8d06a563053d