diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d5b95bc..7c9902a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -75,8 +75,8 @@ jobs:
             rust: stable
           - name: beta
             rust: beta
-          - name: 1.65.0
-            rust: 1.65.0
+          - name: '1.70'
+            rust: '1.70'
 
     steps:
       - name: Checkout
diff --git a/Cargo.toml b/Cargo.toml
index 0658e6f..8115134 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@ authors = ["Alexis Mousset <contact@amousset.me>", "Paolo Barbolini <paolo@paolo
 categories = ["email", "network-programming"]
 keywords = ["email", "smtp", "mailer", "message", "sendmail"]
 edition = "2021"
-rust-version = "1.65"
+rust-version = "1.70"
 
 [badges]
 is-it-maintained-issue-resolution = { repository = "lettre/lettre" }
diff --git a/README.md b/README.md
index 68ebdd5..95e267a 100644
--- a/README.md
+++ b/README.md
@@ -53,12 +53,12 @@ Lettre does not provide (for now):
 ## Supported Rust Versions
 
 Lettre supports all Rust versions released in the last 6 months. At the time of writing
-the minimum supported Rust version is 1.65, but this could change at any time either from
+the minimum supported Rust version is 1.70, but this could change at any time either from
 one of our dependencies bumping their MSRV or by a new patch release of lettre.
 
 ## Example
 
-This library requires Rust 1.65 or newer.
+This library requires Rust 1.70 or newer.
 To use this library, add the following to your `Cargo.toml`:
 
 ```toml
diff --git a/src/lib.rs b/src/lib.rs
index f6f9772..3f5300d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -6,7 +6,7 @@
 //! * Secure defaults
 //! * Async support
 //!
-//! Lettre requires Rust 1.65 or newer.
+//! Lettre requires Rust 1.70 or newer.
 //!
 //! ## Features
 //!