diff --git a/.github/workflows/github-ci.yml b/.github/workflows/github-ci.yml
index 262340e..08d3612 100644
--- a/.github/workflows/github-ci.yml
+++ b/.github/workflows/github-ci.yml
@@ -12,7 +12,7 @@ jobs:
         rust:
           - stable
           - beta
-          - 1.60.0
+          - 1.70.0
           # - nightly
     env:
       TEST_PORT_A: /tmp/ttyS10
@@ -43,7 +43,7 @@ jobs:
         rust:
           - stable
           - beta
-          - 1.60.0
+          - 1.70.0
           # - nightly
     env:
       TEST_PORT_A: /tmp/ttyS10
@@ -81,7 +81,7 @@ jobs:
         rust:
           - stable
           - beta
-          - 1.60.0
+          - 1.70.0
           # - nightly
     env:
       TEST_PORT_A: COM10
diff --git a/Cargo.toml b/Cargo.toml
index 5fddbc6..dbe1548 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,14 +13,14 @@ categories = ["asynchronous", "hardware-support"]
 edition = "2018"
 
 [package.metadata]
-msrv = "1.60.0" # Used by cargo-msrv
+msrv = "1.70.0" # Used by cargo-msrv
 
 [features]
 default = []
 libudev = ["serialport/libudev"]
 
 [dependencies.mio]
-version = "0.8"
+version = "1"
 features = ["os-poll", "os-ext"]
 
 [dependencies.serialport]
diff --git a/README.md b/README.md
index f1e9b17..27d5fab 100644
--- a/README.md
+++ b/README.md
@@ -38,7 +38,7 @@ cargo build --no-default-features
 ```
 
 ### MSRV
-The Minimum Supported Rust Version is **1.60.0** as found using [cargo-msrv](https://crates.io/crates/cargo-msrv)
+The Minimum Supported Rust Version is **1.70.0** as found using [cargo-msrv](https://crates.io/crates/cargo-msrv)
 
 ## Examples
 A few examples can be found [here](https://github.com/berkowski/mio-serial/tree/master/examples).