diff --git a/Cargo.toml b/Cargo.toml
index d56ad41..5e1b628 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -70,7 +70,7 @@ toml = "0.5"
 openssl = { version = "0.10", features = ["vendored"], optional = true }
 
 [target.'cfg(unix)'.dependencies]
-nix = "0.16"
+nix = "0.18"
 
 [target.'cfg(windows)'.dependencies]
 winapi = "0.3"
diff --git a/constellation-internal/Cargo.toml b/constellation-internal/Cargo.toml
index 37f06f4..7efcdc1 100644
--- a/constellation-internal/Cargo.toml
+++ b/constellation-internal/Cargo.toml
@@ -30,7 +30,7 @@ serde_bytes = "0.11"
 serde_json = "1.0"
 
 [target.'cfg(unix)'.dependencies]
-nix = "0.16"
+nix = "0.18"
 
 [target.'cfg(windows)'.dependencies]
 winapi = { version = "0.3", features = [] }