diff --git a/.gitmodules b/.gitmodules
index 032564c..1f8b8b9 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -2,3 +2,7 @@
 	path = minimap2
 	url = git@github.com:lh3/minimap2.git
 	branch = master
+[submodule "pipe"]
+	path = pipe
+	url = git@github.com:cgaebel/pipe.git
+	branch = lock_free
diff --git a/pipe b/pipe
new file mode 160000
index 0000000..9274b73
--- /dev/null
+++ b/pipe
@@ -0,0 +1 @@
+Subproject commit 9274b738714fbe4772a5441c7bc0f02926c08bfd