diff --git a/Cargo.toml b/Cargo.toml
index db36f37..19814a6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,3 +9,4 @@ zip = ">= 0.5.13"
 
 [profile.release]
 lto = true
+opt-level = 3