diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..7e907f4
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "lib/solidity-stringutils"]
+	path = lib/solidity-stringutils
+	url = https://github.com/Arachnid/solidity-stringutils
diff --git a/lib/solidity-stringutils b/lib/solidity-stringutils
new file mode 160000
index 0000000..4b2fcc4
--- /dev/null
+++ b/lib/solidity-stringutils
@@ -0,0 +1 @@
+Subproject commit 4b2fcc43fa0426e19ce88b1f1ec16f5903a2e461