diff --git a/.gitmodules b/.gitmodules
index a3367e2..4fe1718 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -31,3 +31,6 @@
 [submodule "fringe-current-line"]
 	path = fringe-current-line
 	url = https://github.com/kyanagi/fringe-current-line.git
+[submodule "hlinum-mode"]
+	path = hlinum-mode
+	url = https://github.com/ffailla/hlinum-mode.git
diff --git a/hlinum-mode b/hlinum-mode
new file mode 160000
index 0000000..d325fa1
--- /dev/null
+++ b/hlinum-mode
@@ -0,0 +1 @@
+Subproject commit d325fa1ef749893d1b647f154097c3729e9af358