diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b127938c..94069895 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,7 +22,7 @@ jobs:
 
         include:
           # Test MSRV
-          - rust: 1.65.0  # keep in sync with manifest rust-version
+          - rust: 1.70.0  # keep in sync with manifest rust-version
             TARGET: x86_64-unknown-linux-gnu
 
           # Test nightly but don't fail
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 208cc839..7b4e416c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+### Breaking
+- MSRV is now `1.70.0`.
+
 ## [v0.6.0] - 2024-08-07
 
 ### Breaking
diff --git a/Cargo.toml b/Cargo.toml
index e332feb2..9913794f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,7 +8,7 @@ categories = ["no-std"]
 description = "serde-json for no_std programs"
 documentation = "https://docs.rs/serde-json-core"
 edition = "2018"
-rust-version = "1.65.0"  # keep in sync with ci, src/lib.rs, and README
+rust-version = "1.70.0"  # keep in sync with ci, src/lib.rs, and README
 keywords = ["serde", "json"]
 license = "MIT OR Apache-2.0"
 name = "serde-json-core"
diff --git a/README.md b/README.md
index f4c3c2b3..b1640796 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ This project is developed and maintained by the [rust-embedded-community].
 
 ## Minimum Supported Rust Version (MSRV)
 
-This crate is guaranteed to compile on stable Rust 1.65.0 and up. It *might*
+This crate is guaranteed to compile on stable Rust 1.70.0 and up. It *might*
 compile with older versions but that may change in any new patch release.
 
 ## License
diff --git a/src/lib.rs b/src/lib.rs
index 5e8b9220..abc743c0 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -70,7 +70,7 @@
 //!
 //! # Minimum Supported Rust Version (MSRV)
 //!
-//! This crate is guaranteed to compile on stable Rust 1.65.0 and up. It *might* compile with older
+//! This crate is guaranteed to compile on stable Rust 1.70.0 and up. It *might* compile with older
 //! versions but that may change in any new patch release.
 
 #![deny(missing_docs)]