diff --git a/.gitmodules b/.gitmodules
index f5e4f24..afc3200 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -49,3 +49,6 @@
 [submodule "dependencies/trantor"]
 	path = dependencies/trantor
 	url = https://github.com/KJNeko/trantor.git
+[submodule "3rd-party/hydrui"]
+	path = 3rd-party/hydrui
+	url = https://github.com/hydrui/hydrui.git
diff --git a/3rd-party/hydrui b/3rd-party/hydrui
new file mode 160000
index 0000000..62f01f8
--- /dev/null
+++ b/3rd-party/hydrui
@@ -0,0 +1 @@
+Subproject commit 62f01f8a70bed9717ed0cfa0171f5b5502a93ba3