--- a/Cargo.toml
+++ b/Cargo.toml
@@ -96,7 +96,7 @@
 signals = ["nix"]
 
 [target."cfg(unix)".dependencies.nix]
-version = "0.28"
+version = ">= 0.28, < 1"
 features = ["signal"]
 optional = true
 default-features = false