--- a/Cargo.toml	2020-11-03 13:26:25.448253215 -0800
+++ b/Cargo.toml	2020-11-03 13:26:37.736262013 -0800
@@ -23,7 +23,7 @@
 license = "MIT/Apache-2.0"
 repository = "https://github.com/jcreekmore/timeout-readwrite-rs"
 [dependencies.nix]
-version = "0.17.0"
+version = ">=0.17.0, <0.20.0"
 [dev-dependencies.lazy_static]
 version = "1.3.0"
 [badges.travis-ci]