diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 6f8aaeda..56815c1d 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -14,7 +14,7 @@ jobs:
         os: [ubuntu-latest, macos-latest, windows-latest]
         rust:
           - stable
-          - 1.51.0
+          - 1.56.1
     steps:
     - uses: actions/checkout@v2
     - uses: actions-rs/toolchain@v1
@@ -63,7 +63,7 @@ jobs:
       - name: Run cargo-tarpaulin
         uses: actions-rs/tarpaulin@v0.1
         with:
-          version: '0.10.2'
+          version: '0.18.5'
           args: '-o Lcov -- --test-threads 1'
       - name: Run Coveralls
         uses: coverallsapp/github-action@master
diff --git a/README.md b/README.md
index bbec887a..8fd456a3 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ issue / pull request should be filled on the reference repository.
 [CONTRIBUTING.md](/CONTRIBUTING.md).
 
 ## Building
-Fairly simple. First, install [Rust] >= 1.51.0 and a C compiler ([Build Tools
+Fairly simple. First, install [Rust] >= 1.56.1 and a C compiler ([Build Tools
 for Visual Studio][VSBuild] on Windows, GCC or Clang on other platforms).
 
 Then you can build the debug version with
diff --git a/examples/Cargo.toml b/examples/Cargo.toml
index fee58316..b7b2437e 100644
--- a/examples/Cargo.toml
+++ b/examples/Cargo.toml
@@ -2,7 +2,7 @@
 name = "examples"
 version = "0.0.0"
 publish = false
-edition = "2018"
+edition = "2021"
 
 [dev-dependencies]
 tox_binary_io = { version = "0.1.1", path = "../tox_binary_io", features = ["crypto"] }
diff --git a/tox/Cargo.toml b/tox/Cargo.toml
index becfbedc..70c55f87 100644
--- a/tox/Cargo.toml
+++ b/tox/Cargo.toml
@@ -19,7 +19,7 @@ repository = "https://github.com/tox-rs/tox/"
 keywords = ["p2p", "instant-messaging", "tox", "toxcore", "networking"]
 categories = ["multimedia"]
 license = "GPL-3.0+"
-edition = "2018"
+edition = "2021"
 
 [badges]
 travis-ci = { repository = "tox-rs/tox" }
diff --git a/tox_binary_io/Cargo.toml b/tox_binary_io/Cargo.toml
index d44b4f03..a5daa4d8 100644
--- a/tox_binary_io/Cargo.toml
+++ b/tox_binary_io/Cargo.toml
@@ -12,7 +12,7 @@ description = "I/O traits for tox"
 documentation = "https://docs.rs/tox_binary_io/"
 repository = "https://github.com/tox-rs/tox/"
 license = "GPL-3.0+"
-edition = "2018"
+edition = "2021"
 
 [dependencies]
 nom = "7.0"
diff --git a/tox_core/Cargo.toml b/tox_core/Cargo.toml
index 5e68e556..c60fb22b 100644
--- a/tox_core/Cargo.toml
+++ b/tox_core/Cargo.toml
@@ -14,7 +14,7 @@ repository = "https://github.com/tox-rs/tox/"
 keywords = ["p2p", "instant-messaging", "tox", "toxcore", "networking"]
 categories = ["multimedia"]
 license = "GPL-3.0+"
-edition = "2018"
+edition = "2021"
 
 [dependencies]
 tox_binary_io = { version = "0.1.1", path = "../tox_binary_io" }
diff --git a/tox_crypto/Cargo.toml b/tox_crypto/Cargo.toml
index 4e788344..5c357a2c 100644
--- a/tox_crypto/Cargo.toml
+++ b/tox_crypto/Cargo.toml
@@ -14,7 +14,7 @@ repository = "https://github.com/tox-rs/tox/"
 keywords = ["tox", "toxcore", "crypto"]
 categories = ["multimedia"]
 license = "GPL-3.0+"
-edition = "2018"
+edition = "2021"
 
 [dependencies]
 crypto_box = "0.7"
diff --git a/tox_encryptsave/Cargo.toml b/tox_encryptsave/Cargo.toml
index 26915e15..def21026 100644
--- a/tox_encryptsave/Cargo.toml
+++ b/tox_encryptsave/Cargo.toml
@@ -14,7 +14,7 @@ repository = "https://github.com/tox-rs/tox/"
 keywords = ["p2p", "instant-messaging", "tox", "toxcore", "networking"]
 categories = ["multimedia"]
 license = "GPL-3.0+"
-edition = "2018"
+edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/tox_packet/Cargo.toml b/tox_packet/Cargo.toml
index d208fd38..100c9250 100644
--- a/tox_packet/Cargo.toml
+++ b/tox_packet/Cargo.toml
@@ -14,7 +14,7 @@ repository = "https://github.com/tox-rs/tox/"
 keywords = ["p2p", "instant-messaging", "tox", "toxcore", "networking"]
 categories = ["multimedia"]
 license = "GPL-3.0+"
-edition = "2018"
+edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html