diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..e68d7b0
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,4 @@
+[submodule "neorv32"]
+	path = neorv32
+	url = https://github.com/tmeissner/neorv32.git
+	branch = aes_cfs
diff --git a/neorv32 b/neorv32
new file mode 160000
index 0000000..74c0817
--- /dev/null
+++ b/neorv32
@@ -0,0 +1 @@
+Subproject commit 74c0817a1e7cd254fc9dff0153c88591b86593e7