diff --git a/.gitmodules b/.gitmodules
index a3001056e5990fbf6211a6262471124131ba9dfa..c054dabbcf700152a1ffd1304d8db824fc9a88dc 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,6 +1,6 @@
 [submodule "doc_module_vitis"]
 	path = doc_module_vitis
-	url = http://gitlab.veremes.net/Documentation/doc_module_vitis.git
+	url = https://gitlab.veremes.net/Documentation/doc_module_vitis.git
 [submodule "doc_module_extraction"]
 	path = doc_module_extraction
-	url = http://gitlab.veremes.net/Documentation/doc_module_extraction.git
+	url = https://gitlab.veremes.net/Documentation/doc_module_extraction.git