diff --git a/.gitmodules b/.gitmodules
index 2e260f89134..5d82758a234 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,16 +1,15 @@
 [submodule "extern/filecoin-ffi"]
 	path = extern/filecoin-ffi
 	url = https://github.com/filecoin-project/filecoin-ffi.git
-	branch = master
 [submodule "extern/serialization-vectors"]
 	path = extern/serialization-vectors
-	url = https://github.com/filecoin-project/serialization-vectors
+	url = https://github.com/filecoin-project/serialization-vectors.git
 [submodule "extern/test-vectors"]
 	path = extern/test-vectors
 	url = https://github.com/filecoin-project/test-vectors.git
 [submodule "extern/oni"]
 	path = extern/oni
-	url = https://github.com/filecoin-project/oni
+	url = https://github.com/filecoin-project/oni.git
 [submodule "extern/blst"]
 	path = extern/blst
-	url = git@github.com:supranational/blst.git
+	url = https://github.com/supranational/blst.git