diff --git a/.gitmodules b/.gitmodules
index 778f9e8..0ab2156 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "chisel/difftest"]
 	path = chisel/difftest
-	url = https://github.com/OpenXiangShan/difftest.git
+	url = https://github.com/Ciliphen/riscv-difftest.git
diff --git a/chisel/difftest b/chisel/difftest
new file mode 160000
index 0000000..f41fe98
--- /dev/null
+++ b/chisel/difftest
@@ -0,0 +1 @@
+Subproject commit f41fe9897f5b0ed213e270ffdd2f8b179ef37a29