diff --git a/Cargo.toml b/Cargo.toml
index 69585b3..72d0987 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,3 +9,6 @@ thiserror-impl = { version = "0.0", path = "impl" }
 
 [dev-dependencies]
 anyhow = "1.0"
+
+[workspace]
+members = ["impl"]