diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 53706a7..bd14320 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,11 +12,11 @@ jobs:
   ci:
     strategy:
       matrix:
-        rust: [beta, stable, 1.38.0]
+        rust: [beta, stable, 1.40.0]
         os: [ubuntu-latest]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@v1
         with:
           toolchain: ${{ matrix.rust }}