diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 75bc87d..23dc3b7 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -15,6 +15,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: dtolnay/rust-toolchain@1.42.0
+      - uses: dtolnay/rust-toolchain@1.56.0
       - run: cargo test --all
 
diff --git a/Cargo.toml b/Cargo.toml
index 5268197..e1332de 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,8 +1,8 @@
 [package]
 name = "proc-macro-crate"
-version = "1.2.1"
+version = "1.3.0"
 authors = ["Bastian Köcher <git@kchr.de>"]
-edition = "2018"
+edition = "2021"
 categories = ["development-tools::procedural-macro-helpers"]
 documentation = "https://docs.rs/proc-macro-crate"
 repository = "https://github.com/bkchr/proc-macro-crate"
@@ -12,6 +12,7 @@ description = """
 Replacement for crate (macro_rules keyword) in proc-macros
 """
 readme = "./README.md"
+rust-version = "1.56.0"
 
 [dependencies]
 toml_edit = "0.18"