diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index db070c3..bc8fc63 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -99,7 +99,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@1.63.0
+      - uses: dtolnay/rust-toolchain@1.64.0
       - run: cargo check
 
   fmt: