diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a02fd968..3b8cfc93 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,7 +23,7 @@ jobs:
       - name: Install rust
         uses: hecrj/setup-rust-action@v1
         with:
-          rust-version: "1.38.0"
+          rust-version: "1.40.0"
 
       - name: Install python
         uses: actions/setup-python@v1