diff --git a/.gitmodules b/.gitmodules
index be9ec7126a55b0b3a19306619c47b09722241286..f51caa5c1f2b03765e60820b5f406f5f433b3ae1 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "ppsi"]
 	path = ppsi
-	url = git://ohwr.org/white-rabbit/ppsi.git
+	url = https://ohwr.org/project/ppsi.git