diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 9584ba6..b9a6e90 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -14,7 +14,7 @@ jobs:
     strategy:
       matrix:
         rust-toolchains:
-          - 1.43.0
+          - 1.56.0
           - stable
           - beta
         cargo-locked: ["--locked", ""]
@@ -52,7 +52,7 @@ jobs:
           - macos-latest
           - windows-latest
         rust-toolchains:
-          - 1.43.0
+          - 1.56.0
           - stable
           - nightly
     steps:
diff --git a/.github/workflows/future-proof.yml b/.github/workflows/future-proof.yml
index a6b9323..eab3737 100644
--- a/.github/workflows/future-proof.yml
+++ b/.github/workflows/future-proof.yml
@@ -20,7 +20,7 @@ jobs:
           - macos-latest
           - windows-latest
         rust-toolchains:
-          - 1.42.0
+          - 1.56.0
           - stable
           - beta
           - nightly
diff --git a/Cargo.lock b/Cargo.lock
index 76a4975..5f566fb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,43 +1,45 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "proc-macro2"
-version = "1.0.0"
+version = "1.0.66"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "19f287c234c9b2d0308d692dee5c449c1a171167a6f8150f7cf2a49d8fd96967"
+checksum = "18fb31db3f9bddb2ea821cde30a9f70117e3f119938b5ee630b7403aa6e2ead9"
 dependencies = [
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.0"
+version = "1.0.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7ab938ebe6f1c82426b5fb82eaf10c3e3028c53deaa3fbe38f5904b37cf4d767"
+checksum = "4424af4bf778aae2051a77b60283332f386554255d722233d09fbfc7e30da2fc"
 dependencies = [
  "proc-macro2",
 ]
 
 [[package]]
 name = "syn"
-version = "1.0.0"
+version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9f8c8eab7d9f493cd89d4068085651d81ac7d39c56eb64f7158ea514b156e280"
+checksum = "4cff13bb1732bccfe3b246f3fdb09edfd51c01d6f5299b7ccd9457c2e4e37774"
 dependencies = [
  "proc-macro2",
  "quote",
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
-name = "unicode-xid"
-version = "0.2.0"
+name = "unicode-ident"
+version = "1.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
+checksum = "301abaae475aa91687eb82514b328ab47a211a533026cb25fc3e519b86adfc3c"
 
 [[package]]
 name = "visibility"
-version = "0.0.1"
+version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index a85f7a5..0e33bf0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,11 +3,11 @@ proc-macro = true
 
 [package]
 name = "visibility"
-version = "0.0.1"
+version = "0.1.0"
 authors = [
     "Daniel Henry-Mantilla <daniel.henry.mantilla@gmail.com>",
 ]
-edition = "2018"
+edition = "2021"
 
 license = "Zlib OR MIT OR Apache-2.0"
 
@@ -31,9 +31,9 @@ categories = [
 ]
 
 [dependencies]
-syn = { version = "1.0.0", features = ["full"] }
-quote = "1.0.0"
-proc-macro2 = "1.0.0"
+syn = { version = "2.0.0", features = ["full"] }
+quote = "1.0.26"
+proc-macro2 = "1.0.60"
 
 [features]
 nightly = []
diff --git a/README.md b/README.md
index 201fc8a..2039eb1 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 [![Repository](https://img.shields.io/badge/repository-GitHub-brightgreen.svg)](https://github.com/danielhenrymantilla/visibility.rs)
 [![Latest version](https://img.shields.io/crates/v/visibility.svg)](https://crates.io/crates/visibility)
 [![Documentation](https://docs.rs/visibility/badge.svg)](https://docs.rs/visibility)
-[![MSRV](https://img.shields.io/badge/MSRV-1.43.0-white)](https://gist.github.com/danielhenrymantilla/8e5b721b3929084562f8f65668920c33)
+[![MSRV](https://img.shields.io/badge/MSRV-1.56.0-white)](https://gist.github.com/danielhenrymantilla/8e5b721b3929084562f8f65668920c33)
 [![unsafe forbidden](https://img.shields.io/badge/unsafe-forbidden-success.svg)](https://github.com/rust-secure-code/safety-dance/)
 [![License](https://img.shields.io/crates/l/visibility.svg)](https://github.com/danielhenrymantilla/visibility.rs/blob/master/LICENSE)
 [![CI](https://github.com/danielhenrymantilla/visibility.rs/workflows/CI/badge.svg)](https://github.com/danielhenrymantilla/visibility.rs/actions)
diff --git a/rust-toolchain b/rust-toolchain
index b978278..3ebf789 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1 +1 @@
-1.43.0
+1.56.0
diff --git a/src/lib.rs b/src/lib.rs
index 2e0439a..780f5b1 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -64,7 +64,6 @@ fn make (attrs: TokenStream, input: TokenStream)
         // | Item::ForeignMod(ItemForeignMod { ref mut vis, .. }) => *vis = visibility,
         // | Item::Impl(ItemImpl { ref mut vis, .. }) => *vis = visibility,
         // | Item::Macro(ItemMacro { ref mut vis, .. }) => *vis = visibility,
-        | Item::Macro2(ItemMacro2 { ref mut vis, .. }) => *vis = visibility,
         | Item::Mod(ItemMod { ref mut vis, .. }) => *vis = visibility,
         | Item::Static(ItemStatic { ref mut vis, .. }) => *vis = visibility,
         | Item::Struct(ItemStruct { ref mut vis, .. }) => *vis = visibility,