diff --git a/Cargo.lock b/Cargo.lock
index 55e6d5a16..1de27b79c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3281,6 +3281,7 @@ dependencies = [
  "jsonrpc-pubsub 14.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "jsonrpc-ws-server 14.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "matches 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "memmap 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",