diff --git a/acme_common/Cargo.toml b/acme_common/Cargo.toml
index ec79afa..1686d57 100644
--- a/acme_common/Cargo.toml
+++ b/acme_common/Cargo.toml
@@ -36,4 +36,4 @@ syslog = "5.0"
 toml = "0.5"
 
 [target.'cfg(unix)'.dependencies]
-nix = "0.19"
+nix = "0.20"