diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 59f2fc4..0fa8f2e 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -87,6 +87,6 @@ jobs:
 
       - uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: "1.63"
+          toolchain: "1.70"
 
       - run: cargo check --locked --lib --all-features
diff --git a/Cargo.toml b/Cargo.toml
index a32176f..c9b89bd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,7 +9,7 @@ readme = "README.md"
 description = "Asynchronous TLS/SSL streams for Tokio using Rustls."
 categories = ["asynchronous", "cryptography", "network-programming"]
 edition = "2021"
-rust-version = "1.63"
+rust-version = "1.70"
 exclude = ["/.github", "/examples", "/scripts"]
 
 [dependencies]