diff --git a/.cargo/config.toml b/.cargo/config.toml
index 7130740..4852410 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -13,5 +13,5 @@ rustflags = [
     "-Clink-arg=--js-library=js/embed/soljson_interface.js",
     "-Clink-arg=--pre-js=js/embed/pre.js",
     "-Clink-arg=-sNODEJS_CATCH_EXIT=0",
-    "-Copt-level=0"
+    "-Copt-level=3"
 ]