diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 48c54ed..6c2658c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -27,7 +27,7 @@ jobs:
         # When pinned to a SHA the channel must be given explicitly via `toolchain`.
         uses: dtolnay/rust-toolchain@67ef31d5b988238dd797d409d6f9574278e20537
         with:
-          toolchain: stable
+          toolchain: "1.96.0" # latest stable as of 2026-05-28
           components: rustfmt, clippy
 
       - name: Cache cargo build
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 0e7b6fd..28cd8a2 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -48,7 +48,7 @@ jobs:
         # When pinned to a SHA the channel must be given explicitly via `toolchain`.
         uses: dtolnay/rust-toolchain@67ef31d5b988238dd797d409d6f9574278e20537
         with:
-          toolchain: stable
+          toolchain: "1.96.0" # latest stable as of 2026-05-28
           targets: ${{ matrix.target }}
 
       - name: Cache cargo build