diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..29715a4
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "libaegis"]
+	path = libaegis
+	url = https://github.com/aegis-aead/libaegis.git
diff --git a/libaegis b/libaegis
new file mode 160000
index 0000000..6a33995
--- /dev/null
+++ b/libaegis
@@ -0,0 +1 @@
+Subproject commit 6a33995c7e5daea3b10006d813e4b2a7aa8009d8