diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..263e6b6
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "hpx"]
+	path = hpx
+	url = https://github.com/STEllAR-GROUP/hpx.git
diff --git a/hpx b/hpx
new file mode 160000
index 0000000..21b14dc
--- /dev/null
+++ b/hpx
@@ -0,0 +1 @@
+Subproject commit 21b14dc3574b8ddf3f83052b76d2cbe7e6de36e2