diff --git a/.gitmodules b/.gitmodules
index efff202..571de00 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -5,4 +5,3 @@
 [submodule "power-grid-model"]
 	path = power-grid-model
 	url = git@github.com:PowerGridModel/power-grid-model.git
-	branch = main