diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..ea04758
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "re2oapi"]
+	path = re2oapi
+	url = https://gitlab.federez.net/re2o/re2oapi/
diff --git a/re2oapi b/re2oapi
new file mode 160000
index 0000000..729cfcb
--- /dev/null
+++ b/re2oapi
@@ -0,0 +1 @@
+Subproject commit 729cfcb7acbf669a11e507f55b326d87178628d5