diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..5a507b6
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "styles"]
+	path = styles
+	url = git@github.com:citation-style-language/styles.git
+[submodule "locales"]
+	path = locales
+	url = git@github.com:citation-style-language/locales.git
diff --git a/locales b/locales
new file mode 160000
index 0000000..6e3d49b
--- /dev/null
+++ b/locales
@@ -0,0 +1 @@
+Subproject commit 6e3d49bb0babc1715596b4be5f692450e92a8323
diff --git a/styles b/styles
new file mode 160000
index 0000000..f92c08c
--- /dev/null
+++ b/styles
@@ -0,0 +1 @@
+Subproject commit f92c08c60f065c97b08376c35a0ff323a91f18ed