diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 09539fa..01ffe5e 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -54,7 +54,7 @@ jobs:
     - uses: actions/checkout@0717577d45739eb3c851188b29f50ed6c0b2194e # v2.8.0
 
     - name: Install latest stable
-      uses: dtolnay/rust-toolchain@stable
+      uses: dtolnay/rust-toolchain@7e38f4b43b4db5c8dd498af069a4f6196df1d067 # v1
       with:
         targets: ${{ matrix.host_target }}
 
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 4927866..76648a0 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -53,7 +53,7 @@ jobs:
     steps:
       - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
       - name: Install latest stable
-        uses: dtolnay/rust-toolchain@stable
+        uses: dtolnay/rust-toolchain@7e38f4b43b4db5c8dd498af069a4f6196df1d067 # v1
         with:
           targets: ${{ matrix.target }}