diff --git a/Cargo.lock b/Cargo.lock
index 7fc7cbc41..1b9be74ed 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -438,7 +438,6 @@ dependencies = [
  "base32 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "clippy 0.0.103 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "ethcore 1.6.0",
  "ethcore-devtools 1.6.0",
  "ethcore-rpc 1.6.0",
  "ethcore-util 1.6.0",