diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 1117479..159f244 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -14,7 +14,7 @@ jobs:
 
       - uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: "1.84.0"
+          toolchain: "1.83.0"
 
       - name: version info
         run: rustc --version; cargo --version;
@@ -30,7 +30,7 @@ jobs:
 
       - uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: "1.84.0"
+          toolchain: "1.83.0"
 
       - run: |
           rustup component add rustfmt
@@ -44,7 +44,7 @@ jobs:
 
       - uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: "1.84.0"
+          toolchain: "1.83.0"
 
       - run: |
           rustup component add clippy