diff --git a/Cargo.toml b/Cargo.toml
index 7613171..d59059d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,7 +18,7 @@ serializable = ["serde"]
 [dependencies]
 markdown = "=1.0.0-alpha.21"
 serde = { version = "1", optional = true }
-swc_core = { version = "3.0", features = [
+swc_core = { version = "4.0", features = [
   "common",
   "ecma_ast",
   "ecma_codegen",