diff --git a/Cargo.toml b/Cargo.toml
index 89613b3..51a5073 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,10 +20,8 @@ default = ["native"]
 native = []
 
 [dependencies]
-syn = { version = "0.15.33", features = ["full"] }
-proc-macro2 = { version = "0.4.29", features = ["nightly"] }
-quote = "0.6.12"
-async-trait = "0.1.11"
+syn = { version = "1.0", features = ["full"] }
+quote = "1.0"
 
 [dev-dependencies]
 async-std = "0.99.5"
diff --git a/src/lib.rs b/src/lib.rs
index f4a8f5b..e3ebbce 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -65,9 +65,9 @@ use syn::spanned::Spanned;
 pub fn main(_attr: TokenStream, item: TokenStream) -> TokenStream {
     let input = syn::parse_macro_input!(item as syn::ItemFn);
 
-    let ret = &input.decl.output;
-    let inputs = &input.decl.inputs;
-    let name = &input.ident;
+    let ret = &input.sig.output;
+    let inputs = &input.sig.inputs;
+    let name = &input.sig.ident;
     let body = &input.block;
     let attrs = &input.attrs;
 
@@ -77,7 +77,7 @@ pub fn main(_attr: TokenStream, item: TokenStream) -> TokenStream {
         });
     }
 
-    if input.asyncness.is_none() {
+    if input.sig.asyncness.is_none() {
         return TokenStream::from(quote_spanned! { input.span() =>
             compile_error!("the async keyword is missing from the function declaration"),
         });
@@ -86,7 +86,7 @@ pub fn main(_attr: TokenStream, item: TokenStream) -> TokenStream {
     let result = quote! {
         fn main() #ret {
             #(#attrs)*
-            async fn main(#(#inputs),*) #ret {
+            async fn main(#inputs) #ret {
                 #body
             }
 
@@ -115,12 +115,12 @@ pub fn main(_attr: TokenStream, item: TokenStream) -> TokenStream {
 pub fn test(_attr: TokenStream, item: TokenStream) -> TokenStream {
     let input = syn::parse_macro_input!(item as syn::ItemFn);
 
-    let ret = &input.decl.output;
-    let name = &input.ident;
+    let ret = &input.sig.output;
+    let name = &input.sig.ident;
     let body = &input.block;
     let attrs = &input.attrs;
 
-    if input.asyncness.is_none() {
+    if input.sig.asyncness.is_none() {
         return TokenStream::from(quote_spanned! { input.span() =>
             compile_error!("the async keyword is missing from the function declaration"),
         });
@@ -159,12 +159,12 @@ pub fn test(_attr: TokenStream, item: TokenStream) -> TokenStream {
 pub fn bench(_attr: TokenStream, item: TokenStream) -> TokenStream {
     let input = syn::parse_macro_input!(item as syn::ItemFn);
 
-    let args = &input.decl.inputs;
-    let name = &input.ident;
+    let args = &input.sig.inputs;
+    let name = &input.sig.ident;
     let body = &input.block;
     let attrs = &input.attrs;
 
-    if input.asyncness.is_none() {
+    if input.sig.asyncness.is_none() {
         return TokenStream::from(quote_spanned! { input.span() =>
             compile_error!("the async keyword is missing from the function declaration"),
         });