diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a44cb35..40b6615 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,6 +12,10 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}-${{ github.event_name }}
   cancel-in-progress: true
 
+env:
+  # Minimum Supported Rust Version for backon
+  BACKON_MSRV: "1.70"
+
 jobs:
   check:
     runs-on: ubuntu-latest
@@ -22,6 +26,18 @@ jobs:
       - name: Clippy
         run: cargo clippy --all-features --all-targets -- -D warnings
 
+  msrv-check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install
+        run: rustup toolchain install ${BACKON_MSRV}
+      - name: Check MSRV
+        run: cargo +${BACKON_MSRV} build
+        env:
+          RUST_LOG: DEBUG
+          RUST_BACKTRACE: full
+
   unit:
     runs-on: ${{ matrix.os }}
     strategy:
diff --git a/Cargo.toml b/Cargo.toml
index 014c2e0..6156acd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,11 +1,11 @@
 [package]
-authors = ["Xuanwo <github@xuanwo.io>"]
 description = "Retry with backoff without effort."
 documentation = "https://docs.rs/backon"
 edition = "2021"
 license = "Apache-2.0"
 name = "backon"
 repository = "https://github.com/Xuanwo/backon"
+rust-version = "1.70"
 version = "0.5.0"
 
 [package.metadata.docs.rs]
@@ -18,8 +18,8 @@ targets = [
 ]
 
 [features]
-gloo-timers-sleep = ["dep:gloo-timers", "gloo-timers/futures"]
-tokio-sleep = ["dep:tokio", "tokio/time"]
+gloo-timers-sleep = ["dep:gloo-timers", "gloo-timers?/futures"]
+tokio-sleep = ["dep:tokio", "tokio?/time"]
 
 [dependencies]
 fastrand = "2.0.0"