diff --git a/.gitmodules b/.gitmodules
index 482fd774ce..4316f92406 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -59,7 +59,7 @@
 	url = https://github.com/UAVCAN/public_regulated_data_types.git
 [submodule "src/drivers/uavcannode_gps_demo/public_regulated_data_types"]
 	path = src/drivers/uavcannode_gps_demo/public_regulated_data_types
-	url = https://github.com/UAVCAN/public_regulated_data_types
+	url = https://github.com/UAVCAN/public_regulated_data_types.git
 [submodule "src/drivers/uavcannode_gps_demo/libcanard"]
 	path = src/drivers/uavcannode_gps_demo/libcanard
-	url = https://github.com/UAVCAN/libcanard
+	url = https://github.com/UAVCAN/libcanard.git