diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 00000000..d250eddf
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,9 @@
+[submodule "external/ezfio"]
+	path = external/ezfio
+	url = https://gitlab.com/scemama/ezfio.git
+[submodule "external/irpf90"]
+	path = external/irpf90
+	url = https://gitlab.com/scemama/irpf90.git
+[submodule "external/qp2-dependencies"]
+	path = external/qp2-dependencies
+	url = https://github.com/QuantumPackage/qp2-dependencies.git
diff --git a/external/ezfio b/external/ezfio
new file mode 160000
index 00000000..d5805497
--- /dev/null
+++ b/external/ezfio
@@ -0,0 +1 @@
+Subproject commit d5805497fa0ef30e70e055cde1ecec2963303e93
diff --git a/external/irpf90 b/external/irpf90
new file mode 160000
index 00000000..ab88cc01
--- /dev/null
+++ b/external/irpf90
@@ -0,0 +1 @@
+Subproject commit ab88cc01a6598a34e47989fa13b8fcadab703419
diff --git a/external/qp2-dependencies b/external/qp2-dependencies
new file mode 160000
index 00000000..242151e0
--- /dev/null
+++ b/external/qp2-dependencies
@@ -0,0 +1 @@
+Subproject commit 242151e03d1d6bf042387226431d82d35845686a