diff --git a/Cargo.toml b/Cargo.toml
index bf221e94d552..e5162934b970 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -215,7 +215,7 @@ opt-level = 3
     opt-level = 3
 
     [profile.release.package.swc_ecma_ast]
-    opt-level = 3
+    opt-level = "s"
 
     [profile.release.package.swc_ecma_transforms_base]
     opt-level = 3
diff --git a/bindings/Cargo.toml b/bindings/Cargo.toml
index 563c48408a5f..8e432daed65e 100644
--- a/bindings/Cargo.toml
+++ b/bindings/Cargo.toml
@@ -117,7 +117,7 @@ codegen-units = 1
     opt-level = 3
 
     [profile.release.package.swc_ecma_ast]
-    opt-level = 3
+    opt-level = "s"
 
     [profile.release.package.swc_ecma_transforms_base]
     opt-level = 3