diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 00000000..97dbdfed
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "mainnet/2024-03-07-sysconfig-updates/lib/forge-std"]
+	path = mainnet/2024-03-07-sysconfig-updates/lib/forge-std
+	url = https://github.com/foundry-rs/forge-std