diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..52bd5f3
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "HangmanLab.Backend"]
+	path = HangmanLab.Backend
+	url = https://git.hangman-lab.top/hzhang/HangmanLab.Backend.git
+[submodule "HangmanLab.Frontend"]
+	path = HangmanLab.Frontend
+	url = https://git.hangman-lab.top/hzhang/HangmanLab.Frontend.git
diff --git a/HangmanLab.Backend b/HangmanLab.Backend
new file mode 160000
index 0000000..e929f67
--- /dev/null
+++ b/HangmanLab.Backend
@@ -0,0 +1 @@
+Subproject commit e929f67f4e343ffea8017a4e87f84dc81a542414
diff --git a/HangmanLab.Frontend b/HangmanLab.Frontend
new file mode 160000
index 0000000..d035a78
--- /dev/null
+++ b/HangmanLab.Frontend
@@ -0,0 +1 @@
+Subproject commit d035a781ae37c50b3e3972ada4d28cdf07df33e8