diff --git a/acmed/Cargo.toml b/acmed/Cargo.toml
index d1017bc..822e14d 100644
--- a/acmed/Cargo.toml
+++ b/acmed/Cargo.toml
@@ -24,7 +24,7 @@ serde_json = "1.0"
 toml = "0.5"
 
 [target.'cfg(unix)'.dependencies]
-nix = "0.17"
+nix = "0.18"
 
 [build-dependencies]
 serde = { version = "1.0", features = ["derive"] }