diff --git a/Cargo.toml b/Cargo.toml
index 5ed07764..4f12ae8a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,7 +22,7 @@ path = "src/main.rs"
 
 
 [profile.release]
-opt-level = "z"
+opt-level = 3
 debug = false
 lto = true
 codegen-units = 1