diff --git a/Cargo.toml b/Cargo.toml
index 4364a2d836..85649bf97a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -23,6 +23,7 @@ opt-level = "z"
 lto = true
 panic = 'abort'
 opt-level = "z"
+codegen-units = 1
 
 [patch.crates-io]
 quinn-udp = { git = "https://github.com/quinn-rs/quinn", branch="main" }