diff --git a/.gitmodules b/.gitmodules
index 40b94ba8e407b2380027c9519781fbc37e7ffece..9afe6b3d91119a20e0c798e51b13a7fb9e7717e5 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "nifty"]
 	path = nifty
-	url = ../nifty
+	url = ../nifty.git