diff --git a/Cargo.toml b/Cargo.toml
index ef7549164f..bdfcd2adbd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -44,3 +44,11 @@ opt-level = 3
 opt-level = 3
 [profile.release.package.brotli-decompressor]
 opt-level = 3
+[profile.release.package.deno_core]
+opt-level = 3
+[profile.release.package.rusty_v8]
+opt-level = 3
+[profile.release.package.serde_v8]
+opt-level = 3
+[profile.release.package.serde]
+opt-level = 3