diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 612fbc14..f8d39d05 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -69,7 +69,7 @@ jobs:
     strategy:
       matrix:
         toolchain:
-          - stable
+          - 1.65
           - nightly
         os:
           - ubuntu-latest