diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2da2774..ce77e75 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -66,7 +66,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        toolchain: ["beta"]
+        toolchain: ["1.81"]
     steps:
       - name: Checkout
         uses: actions/checkout@v4