diff --git a/.gitmodules b/.gitmodules
index 2c9eb07..f15ed51 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -10,3 +10,6 @@
 [submodule "modules/gdcef"]
 	path = modules/gdcef
 	url = https://github.com/Lecrapouille/gdcef.git
+[submodule "modules/godot_heightmap_plugin"]
+	path = modules/godot_heightmap_plugin
+	url = https://github.com/Zylann/godot_heightmap_plugin.git
diff --git a/modules/godot_heightmap_plugin b/modules/godot_heightmap_plugin
new file mode 160000
index 0000000..61d7a5b
--- /dev/null
+++ b/modules/godot_heightmap_plugin
@@ -0,0 +1 @@
+Subproject commit 61d7a5b27eb674ebb9255ee6b30034de8c626721