diff --git a/err-derive/Cargo.toml b/err_derive/Cargo.toml
similarity index 100%
rename from err-derive/Cargo.toml
rename to err_derive/Cargo.toml
diff --git a/err-derive/src/main.rs b/err_derive/src/main.rs
similarity index 100%
rename from err-derive/src/main.rs
rename to err_derive/src/main.rs