diff --git a/Cargo.toml b/Cargo.toml
index cdfefa6eb..bddd432da 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2018"
 license = "MPL-2.0"
 
 [profile.release]
-# lto = true
+lto = true
 
 [dependencies]
 deltachat_derive = { path = "./deltachat_derive" }