diff --git a/.gitmodules b/.gitmodules
index 8646873..2e76afc 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "TinyLLaVA_Factory"]
 	path = TinyLLaVA_Factory
 	url = https://github.com/TinyLLaVA/TinyLLaVA_Factory.git
+[submodule "OpenECADv2toSTEP"]
+	path = OpenECADv2toSTEP
+	url = https://github.com/Yuki-Kokomi/OpenECADv2toSTEP.git
diff --git a/OpenECADv2toSTEP b/OpenECADv2toSTEP
new file mode 160000
index 0000000..7b6e070
--- /dev/null
+++ b/OpenECADv2toSTEP
@@ -0,0 +1 @@
+Subproject commit 7b6e0703c2e43c156bd77d21f7b8b97839494d00