diff --git a/.github/workflows/master.yaml b/.github/workflows/main.yaml
similarity index 91%
rename from .github/workflows/master.yaml
rename to .github/workflows/main.yaml
index f24e2b3..b0119d1 100644
--- a/.github/workflows/master.yaml
+++ b/.github/workflows/main.yaml
@@ -1,8 +1,8 @@
-name: master
+name: main
 on:
   push:
     branches:
-      - master
+      - main
   schedule:
     - cron: '0 0 * * 0' # 00:00 Sunday
 
diff --git a/Cargo.toml b/Cargo.toml
index 2c6ac84..9c23b8b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,10 +16,10 @@ exclude = ["bors.toml", ".github/*"]
 proc-macro = true
 
 [dependencies]
-proc-macro-crate = "0.1"
+proc-macro-crate = "1.2.1"
 proc-macro2 = "1"
 quote = "1"
-syn = { version = "1", features = ["fold", "full"] }
+syn = { version = "2", features = ["fold", "full"] }
 
 [dev-dependencies]
 rayon = "1.3"
diff --git a/README.md b/README.md
index fa88427..6a1cd29 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 [![rayon-macro crate](https://img.shields.io/crates/v/rayon-macro.svg)](https://crates.io/crates/rayon-macro)
 [![rayon-macro documentation](https://docs.rs/rayon-macro/badge.svg)](https://docs.rs/rayon-macro)
 ![minimum rustc 1.45](https://img.shields.io/badge/rustc-1.45+-red.svg)
-![build status](https://github.com/rayon-rs/rayon-macro/workflows/master/badge.svg)
+![build status](https://github.com/rayon-rs/rayon-macro/workflows/main/badge.svg)
 
 The `rayon-macro` crate provides procedural macros to make it easier to
 transform serial code into `rayon`-enabled parallel code. For example,
diff --git a/src/lib.rs b/src/lib.rs
index 04a4008..c2bba2b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,6 +1,6 @@
 use proc_macro::TokenStream;
 use proc_macro2::{Ident, Span};
-use proc_macro_crate::crate_name;
+use proc_macro_crate::{crate_name, FoundCrate};
 use quote::quote;
 use syn::fold::{self, Fold};
 use syn::parse_macro_input;
@@ -34,7 +34,10 @@ pub fn parallel(input: TokenStream) -> TokenStream {
     let body = transform.fold_block(body);
 
     let rayon_crate = crate_name("rayon").expect("rayon is present in `Cargo.toml`");
-    let rayon = Ident::new(&rayon_crate, Span::call_site());
+    let rayon = match rayon_crate {
+        FoundCrate::Name(name) => Ident::new(&name, Span::call_site()),
+        FoundCrate::Itself => panic!("expected a crate name"),
+    };
 
     TokenStream::from(quote! {
         ::#rayon::iter::ParallelIterator::for_each(