diff --git a/.gitmodules b/.gitmodules
index 8f1f736..9a00130 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "externals/sdf_c"]
 	path = externals/sdf_c
-	url = git@github.com:Warwick-Plasma/SDF_C.git
+	url = https://github.com/Warwick-Plasma/SDF_C.git