diff --git a/.gitmodules b/.gitmodules
index 12458c40..1e92cba9 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,9 +1,9 @@
 [submodule "dcm_qa"]
 	path = dcm_qa
-	url = http://github.com/neurolabusc/dcm_qa
+	url = https://github.com/neurolabusc/dcm_qa.git
 [submodule "dcm_qa_nih"]
 	path = dcm_qa_nih
-	url = http://github.com/neurolabusc/dcm_qa_nih
+	url = https://github.com/neurolabusc/dcm_qa_nih.git
 [submodule "dcm_qa_uih"]
 	path = dcm_qa_uih
-	url = http://github.com/neurolabusc/dcm_qa_uih
+	url = https://github.com/neurolabusc/dcm_qa_uih.git