diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..f7dfc26
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "epess-database"]
+	path = epess-database
+	url = https://github.com/EPESS/epess-database
diff --git a/epess-database b/epess-database
new file mode 160000
index 0000000..67eac8f
--- /dev/null
+++ b/epess-database
@@ -0,0 +1 @@
+Subproject commit 67eac8fdce037a4ef27a08ba5fc2bb1e3de52fd3