diff --git a/Cargo.lock b/Cargo.lock
index 52144db..23b51cf 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3,4 +3,124 @@
 [[package]]
 name = "cargo-sandbox"
 version = "0.0.0"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
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diff --git a/Cargo.toml b/Cargo.toml
index ab5ec19..84cc053 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,3 +14,4 @@ keywords    = ["cargo", "sandboxing", "security"]
 maintenance = { status = "experimental" }
 
 [dependencies]
+gaol = "0.2"