diff --git Cargo.toml Cargo.toml
index fca51d5..6a16dd6 100644
--- Cargo.toml
+++ Cargo.toml
@@ -24,3 +24,5 @@ import = { path = "import" }
 [[bin]]
 path = "pbtc/main.rs"
 name = "pbtc"
+
+[workspace]