diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 00acc62..c5c2bce 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@master
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: "1.64"
+          toolchain: "1.70"
           profile: minimal
           override: true
       - name: Run check
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 208d901..e8e26c1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - \[Rust\]: Added `#[allow(dead_code)]` to the root of the generated rust code [#204](https://github.com/planus-org/planus/pull/204)
 - Added the option `ignore_docstring_errors` to the app. [#216](https://github.com/planus-org/planus/pull/216)
+- Get rid of dependency on `atty` and bump the Minimum Support Rust Version (MSRV) to 1.70.0. [#220](https://github.com/planus-org/planus/pull/220)
 
 ### Fixed
 
diff --git a/Cargo.lock b/Cargo.lock
index edabb69..1bb5b9e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -164,17 +164,6 @@ dependencies = [
  "toml",
 ]
 
-[[package]]
-name = "atty"
-version = "0.2.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
-dependencies = [
- "hermit-abi 0.1.19",
- "libc",
- "winapi",
-]
-
 [[package]]
 name = "autocfg"
 version = "1.1.0"
@@ -721,15 +710,6 @@ version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
 
-[[package]]
-name = "hermit-abi"
-version = "0.1.19"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "62b467343b94ba476dcb2500d242dadbb39557df889310ac77c5d99100aaac33"
-dependencies = [
- "libc",
-]
-
 [[package]]
 name = "hermit-abi"
 version = "0.3.3"
@@ -774,7 +754,7 @@ version = "0.4.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cb0889898416213fab133e1d33a0e5858a48177452750691bde3666d0fdbaf8b"
 dependencies = [
- "hermit-abi 0.3.3",
+ "hermit-abi",
  "rustix",
  "windows-sys 0.48.0",
 ]
@@ -1155,7 +1135,6 @@ dependencies = [
 name = "planus-translation"
 version = "0.4.0"
 dependencies = [
- "atty",
  "bitflags 2.4.1",
  "codespan",
  "codespan-reporting",
diff --git a/Cargo.toml b/Cargo.toml
index d876c63..75fd25e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,5 +7,5 @@ resolver = "2"
 version = "0.4.0"
 license = "MIT/Apache-2.0"
 repository = "https://github.com/planus-org/planus"
-rust-version = "1.64"
+rust-version = "1.70"
 edition = "2021"
diff --git a/README.md b/README.md
index e5c285d..31e2ea0 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # Planus – alternative flatbuffer implementation
 
 [![Build Status](https://github.com/planus-org/planus/actions/workflows/rust.yml/badge.svg?branch=main)](https://github.com/planus-org/planus/actions/workflows/rust.yml)
-![Rustc Version 1.64+](https://img.shields.io/badge/rustc-1.64+-lightgray.svg)
+![Rustc Version 1.70+](https://img.shields.io/badge/rustc-1.70+-lightgray.svg)
 [![License](https://img.shields.io/crates/l/planus)](https://crates.io/crates/planus)
 [![Crates.io](https://img.shields.io/crates/v/planus)](https://crates.io/crates/planus)
 [![Rust Documentation](https://img.shields.io/badge/api-rustdoc-blue.svg)](https://docs.rs/planus)
@@ -99,7 +99,7 @@ Things we will probably never support:
 
 ## Minimum Supported Rust Version (MSRV)
 
-Our current Minimum Supported Rust Version is 1.64.0. When adding features, we will follow these guidelines:
+Our current Minimum Supported Rust Version is 1.70.0. When adding features, we will follow these guidelines:
 
 - We will aim to support the latest five minor Rust versions. This gives you a 6 month window to upgrade your compiler.
 - Any change to the MSRV will be accompanied with a minor version bump
diff --git a/crates/planus-translation/Cargo.toml b/crates/planus-translation/Cargo.toml
index 3535bb2..f24ba4f 100644
--- a/crates/planus-translation/Cargo.toml
+++ b/crates/planus-translation/Cargo.toml
@@ -12,7 +12,6 @@ description = "Internal translation library for planus."
 [dependencies]
 planus-lexer = { version = "0.4.0", path = "../planus-lexer" }
 planus-types = { version = "0.4.0", path = "../planus-types" }
-atty = "0.2.14"
 bitflags = "2.3.1"
 codespan = "0.11.1"
 codespan-reporting = "0.11.1"
diff --git a/crates/planus-translation/src/ctx.rs b/crates/planus-translation/src/ctx.rs
index 524a5be..7499745 100644
--- a/crates/planus-translation/src/ctx.rs
+++ b/crates/planus-translation/src/ctx.rs
@@ -1,5 +1,6 @@
 use std::{
     cell::{Cell, RefCell},
+    io::IsTerminal,
     path::{Path, PathBuf},
     sync::RwLock,
 };
@@ -37,7 +38,7 @@ pub struct Ctx {
 
 impl Default for Ctx {
     fn default() -> Self {
-        let color_choice = if atty::is(atty::Stream::Stderr) {
+        let color_choice = if std::io::stderr().is_terminal() {
             ColorChoice::Auto
         } else {
             ColorChoice::Never