diff --git a/deps/gsc-tool-h2 b/deps/gsc-tool-h2
new file mode 160000
index 00000000..b18d79c1
--- /dev/null
+++ b/deps/gsc-tool-h2
@@ -0,0 +1 @@
+Subproject commit b18d79c1da68c8bd97bbba91b72321a1302e651f