diff --git a/crates/macro/Cargo.toml b/crates/macro/Cargo.toml
index 038a0666..fc0ec0b3 100644
--- a/crates/macro/Cargo.toml
+++ b/crates/macro/Cargo.toml
@@ -20,5 +20,5 @@ xxx_debug_only_print_generated_code = []
 [dependencies]
 syn = { version = '0.14', features = ['full'] }
 quote = '0.6'
-proc-macro2 = "0.4"
+proc-macro2 = "0.4.4"
 wasm-bindgen-backend = { path = "../backend", version = "=0.2.11" }
diff --git a/crates/macro/src/lib.rs b/crates/macro/src/lib.rs
index 3b787dc8..d37412e4 100755
--- a/crates/macro/src/lib.rs
+++ b/crates/macro/src/lib.rs
@@ -15,7 +15,7 @@ pub fn wasm_bindgen(attr: TokenStream, input: TokenStream) -> TokenStream {
     let opts = syn::parse::<backend::ast::BindgenAttrs>(attr)
         .expect("invalid arguments to #[wasm_bindgen]");
 
-    let mut ret = proc_macro2::TokenStream::empty();
+    let mut ret = proc_macro2::TokenStream::new();
     let mut program = backend::ast::Program::default();
     program.push_item(item, Some(opts), &mut ret);
     program.to_tokens(&mut ret);