diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index acdc6f1..120b958 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -40,7 +40,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: 1.67.0
+          toolchain: 1.70.0
       - run: cargo check --lib --features fips
 
   msrv:
@@ -49,7 +49,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: 1.67.0
+          toolchain: 1.70.0
       - run: cargo check --lib --all-features
 
   lint:
diff --git a/Cargo.toml b/Cargo.toml
index caaa639..24265e3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 name = "instant-acme"
 version = "0.7.1"
 edition = "2021"
-rust-version = "1.67"
+rust-version = "1.70"
 license = "Apache-2.0"
 description = "Async pure-Rust ACME client"
 homepage = "https://github.com/instant-labs/instant-acme"