diff --git a/Cargo.toml b/Cargo.toml
index 1a00fdc..63c2c0e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,3 +16,7 @@ features = ["with-chrono-0_4"]
 [dependencies.futures-preview]
 version = "=0.3.0-alpha.19"
 features = [ "async-await" ]
+
+[profile.release]
+lto = "fat"
+codegen-units = 1