diff --git a/.gitignore b/.gitignore
old mode 100644
new mode 100755
index 82bff889..b4839ace
--- a/.gitignore
+++ b/.gitignore
@@ -5,4 +5,3 @@
 !/Dockerfile
 !/docker-compose.yml
 !/dev/plugins
-/themes/learn4
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 00000000..7f2f3d7d
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "themes/learn4"]
+	path = themes/learn4
+	url = https://github.com/getgrav/grav-theme-learn4.git
diff --git a/README.md b/README.md
index 23d454b6..d6a6731f 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,13 @@ Please report [issues on YunoHost bugtracker](https://github.com/YunoHost/issues
 
 # Contributing
 
+This repo use a **submodule** to provide the theme. So when you clone use: 
+
+```shell
+git clone --recursive https://github.com/YunoHost/doc.git
+```
+
+
 You can refer to the page on [writing documentation](https://yunohost.org/write_documentation).
 
 If you know docker, you can run:
diff --git a/themes/learn4 b/themes/learn4
new file mode 160000
index 00000000..704a233b
--- /dev/null
+++ b/themes/learn4
@@ -0,0 +1 @@
+Subproject commit 704a233bdba73dcfb197f3d3fcdd9e89778445c3