diff --git a/Cargo.toml b/Cargo.toml
index dd7858d..1475415 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,5 +26,7 @@ libc = "0.2"
 # fine for a CLI/supervisor as there's no long-lived in-process state to
 # unwind (state lives on disk and is written atomically, see src/atomic.rs).
 [profile.release]
-panic = "abort"
-lto   = true
+panic         = "abort"
+lto           = true
+opt-level     = 3
+codegen-units = 1