diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a2b63e8..9d0b239 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,7 +17,7 @@ jobs:
       - uses: actions-rs/toolchain@v1
         with:
           profile: default
-          toolchain: stable
+          toolchain: 1.81.0
           target: wasm32-wasi
           default: true
 
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 1b39dff..1ef5433 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -17,7 +17,7 @@ jobs:
         uses: actions-rs/toolchain@v1
         with:
           profile: default
-          toolchain: stable
+          toolchain: 1.81.0
           target: wasm32-wasi
           default: true