diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9e37cc7..78a8e10 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,7 +26,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2 (Node 24)
       - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@3c5f7ea28cd621ae0bf5283f0e981fb97b8a7af9  # master @ 2026-05
+        uses: dtolnay/rust-toolchain@67ef31d5b988238dd797d409d6f9574278e20537  # master @ 2026-05
         with:
           toolchain: stable
           targets: wasm32-unknown-unknown
@@ -46,7 +46,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2 (Node 24)
       - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@3c5f7ea28cd621ae0bf5283f0e981fb97b8a7af9  # master @ 2026-05
+        uses: dtolnay/rust-toolchain@67ef31d5b988238dd797d409d6f9574278e20537  # master @ 2026-05
         with:
           toolchain: stable
           components: rustfmt
@@ -61,7 +61,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2 (Node 24)
       - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@3c5f7ea28cd621ae0bf5283f0e981fb97b8a7af9  # master @ 2026-05
+        uses: dtolnay/rust-toolchain@67ef31d5b988238dd797d409d6f9574278e20537  # master @ 2026-05
         with:
           toolchain: stable
           components: clippy
@@ -76,7 +76,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2 (Node 24)
       - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@3c5f7ea28cd621ae0bf5283f0e981fb97b8a7af9  # master @ 2026-05
+        uses: dtolnay/rust-toolchain@67ef31d5b988238dd797d409d6f9574278e20537  # master @ 2026-05
         with:
           toolchain: stable
           targets: wasm32-unknown-unknown
@@ -100,7 +100,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2 (Node 24)
       - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@3c5f7ea28cd621ae0bf5283f0e981fb97b8a7af9  # master @ 2026-05
+        uses: dtolnay/rust-toolchain@67ef31d5b988238dd797d409d6f9574278e20537  # master @ 2026-05
         with:
           toolchain: stable
       - uses: Swatinem/rust-cache@23869a5bd66c73db3c0ac40331f3206eb23791dc  # v2.9.1
@@ -116,7 +116,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2 (Node 24)
       - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@3c5f7ea28cd621ae0bf5283f0e981fb97b8a7af9  # master @ 2026-05
+        uses: dtolnay/rust-toolchain@67ef31d5b988238dd797d409d6f9574278e20537  # master @ 2026-05
         with:
           toolchain: stable
       - uses: Swatinem/rust-cache@23869a5bd66c73db3c0ac40331f3206eb23791dc  # v2.9.1
@@ -132,7 +132,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2 (Node 24)
       - name: Install Rust 1.89 (the declared rust-version)
-        uses: dtolnay/rust-toolchain@3c5f7ea28cd621ae0bf5283f0e981fb97b8a7af9  # master @ 2026-05
+        uses: dtolnay/rust-toolchain@67ef31d5b988238dd797d409d6f9574278e20537  # master @ 2026-05
         with:
           toolchain: "1.89"
           # chela-bundle's build script compiles chela-wasm for this target.
diff --git a/.github/workflows/pages.yml b/.github/workflows/pages.yml
index dd45385..e226dcb 100644
--- a/.github/workflows/pages.yml
+++ b/.github/workflows/pages.yml
@@ -31,7 +31,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2 (Node 24)
       - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@3c5f7ea28cd621ae0bf5283f0e981fb97b8a7af9  # master @ 2026-05
+        uses: dtolnay/rust-toolchain@67ef31d5b988238dd797d409d6f9574278e20537  # master @ 2026-05
         with:
           toolchain: stable
           # chela-bundle's build script compiles chela-wasm for this target.
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 4604069..4965184 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -90,7 +90,7 @@ jobs:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2 (Node 24)
 
       - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@3c5f7ea28cd621ae0bf5283f0e981fb97b8a7af9  # master @ 2026-05
+        uses: dtolnay/rust-toolchain@67ef31d5b988238dd797d409d6f9574278e20537  # master @ 2026-05
         with:
           toolchain: stable
           targets: ${{ matrix.target }}
@@ -170,7 +170,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2 (Node 24)
-      - uses: dtolnay/rust-toolchain@3c5f7ea28cd621ae0bf5283f0e981fb97b8a7af9  # master @ 2026-05
+      - uses: dtolnay/rust-toolchain@67ef31d5b988238dd797d409d6f9574278e20537  # master @ 2026-05
         with:
           toolchain: stable
           targets: wasm32-unknown-unknown