diff --git a/.gitmodules b/.gitmodules
index a2b1f260..039be1d4 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,8 +1,6 @@
 [submodule "metadef"]
 	path = metadef
 	url = https://gitee.com/ascend/metadef.git
-	branch = master
 [submodule "parser"]
 	path = parser
 	url = https://gitee.com/ascend/parser.git
-	branch = master
diff --git a/metadef b/metadef
new file mode 160000
index 00000000..31a89522
--- /dev/null
+++ b/metadef
@@ -0,0 +1 @@
+Subproject commit 31a89522398f697410087724885fc7f74d9e7117
diff --git a/parser b/parser
new file mode 160000
index 00000000..76a862b1
--- /dev/null
+++ b/parser
@@ -0,0 +1 @@
+Subproject commit 76a862b1bced4c0c2ca675f0a619ba06ada973b0