diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..b49a4b2
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "externals/medusa_macros"]
+	path = externals/medusa_macros
+	url = https://gitea.tendokyu.moe/Kayori/medusa_macros.git
diff --git a/externals/medusa_macros b/externals/medusa_macros
new file mode 160000
index 0000000..88257a8
--- /dev/null
+++ b/externals/medusa_macros
@@ -0,0 +1 @@
+Subproject commit 88257a8f7ea5e26015a1b28e14cc39fbebc90459