diff --git a/test-crate/Cargo.toml b/test-crate/Cargo.toml
index f3900ad..88caab7 100644
--- a/test-crate/Cargo.toml
+++ b/test-crate/Cargo.toml
@@ -2,11 +2,10 @@
 name = "test-crate"
 version = "0.1.0"
 edition = "2021"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+publish = false
 
 [dependencies]
-libz-sys = { version = "1.1.8", default-features = false, features = ["zlib-ng"] }
+libz-sys = { version = "1.1.19", default-features = false, features = ["zlib-ng"] }
 
 [patch.crates-io]
 cmake = { path = ".." }