diff --git a/.gitmodules b/.gitmodules
index f6c1388..3b0bee2 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "proto"]
 	path = proto
-	url = https://github.com/DMS-SMS/v1-protocol-buffer
\ No newline at end of file
+	url = https://github.com/DMS-SMS/v1-protocol-buffer
+[submodule "const"]
+	path = const
+	url = https://github.com/DMS-SMS/v1-utils
diff --git a/const b/const
new file mode 160000
index 0000000..f5c18d6
--- /dev/null
+++ b/const
@@ -0,0 +1 @@
+Subproject commit f5c18d655960802b19d7e0c7ecaaacc4a234a579