diff --git a/Cargo.toml b/Cargo.toml
index c6aed37..ee67204 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,7 +20,7 @@ features = ["cargo"]
 default-features = true
 
 [profile.release]
-opt-level = 3
+opt-level = "z"
 debug = false
 rpath = false
 lto = true