diff --git a/Cargo.toml b/Cargo.toml
index 682908e2f6e89c81c76372e6006305e8cb9f4e8a..5ca534a9eeda24e8ffd629f9cfc90656f369892b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -337,6 +337,8 @@ debug = "full"
 [profile.dev.package]
 taffy = { opt-level = 3 }
 cranelift-codegen = { opt-level = 3 }
+rustybuzz = { opt-level = 3 }
+ttf-parser = { opt-level = 3 }
 wasmtime-cranelift = { opt-level = 3 }
 
 [profile.release]