diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..f1a4b07
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "stubs/protevus"]
+	path = stubs/protevus
+	url = https://github.com/protevus/protevus
diff --git a/stubs/protevus b/stubs/protevus
new file mode 160000
index 0000000..ae86202
--- /dev/null
+++ b/stubs/protevus
@@ -0,0 +1 @@
+Subproject commit ae862027780cdd53ab7154d2b7954311555382cb