diff --git a/.gitmodules b/.gitmodules
index ab52abc..b306d9e 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,4 @@
+
 [submodule "challenges/h4tum2025/mosaic"]
 	path = challenges/h4tum2025/mosaic
 	url = ssh://git@gitea.cato447.de:222/cato447/mosaic.git
diff --git a/challenges/h4tum2025/mosaic b/challenges/h4tum2025/mosaic
new file mode 160000
index 0000000..4f016be
--- /dev/null
+++ b/challenges/h4tum2025/mosaic
@@ -0,0 +1 @@
+Subproject commit 4f016be90a955a57731c53f0b7811ec58b105d84