diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..9a78796
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,4 @@
+[submodule "hdt-cpp"]
+	path = hdt-cpp
+	url = https://github.com/rdfhdt/hdt-cpp.git
+	branch = develop
diff --git a/hdt-cpp b/hdt-cpp
new file mode 160000
index 0000000..0cd6693
--- /dev/null
+++ b/hdt-cpp
@@ -0,0 +1 @@
+Subproject commit 0cd6693ab0a4519966981b09cda93d262f9464d2