diff --git a/.gitmodules b/.gitmodules
index 50e41c1..ec6b94e 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,5 +4,4 @@
 	branch = stable
 [submodule "lib/geant4"]
 	path = lib/geant4
-	url = https://github.com/Geant4/geant4.git
-	shallow = true
+	url = git@gitlab.etp.kit.edu:lbogner/geant4.git