diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 9926537..100f21b 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -30,7 +30,6 @@ jobs:
         fail-fast: false
         matrix:
           toolchain:
-            - 1.42.0
             - 1.66.0
             - 1.70.0