diff --git a/.github/workflows/rust-ci.yml b/.github/workflows/rust-ci.yml
index 387d94f..12d4caa 100644
--- a/.github/workflows/rust-ci.yml
+++ b/.github/workflows/rust-ci.yml
@@ -86,7 +86,7 @@ jobs:
     timeout-minutes: 60
     steps:
       - uses: actions/checkout@v7.0.1
-      - uses: taiki-e/install-action@v2.87.20
+      - uses: taiki-e/install-action@v2.87.21
         with:
           tool: cargo-deny
       - run: cargo deny check advisories bans licenses sources
@@ -109,7 +109,7 @@ jobs:
       - uses: dtolnay/rust-toolchain@stable
         with:
           components: llvm-tools-preview
-      - uses: taiki-e/install-action@v2.87.20
+      - uses: taiki-e/install-action@v2.87.21
       - name: Generate lcov report
         run: cargo llvm-cov --workspace --lcov --output-path lcov.info
       - name: Enforce minimum coverage
@@ -127,7 +127,7 @@ jobs:
     steps:
       - uses: actions/checkout@v7.0.1
       - uses: dtolnay/rust-toolchain@stable
-      - uses: taiki-e/install-action@v2.87.20
+      - uses: taiki-e/install-action@v2.87.21
         with:
           tool: cargo-mutants
       - name: Run mutation tests on core invariant crates
diff --git a/.github/workflows/security-scan.yml b/.github/workflows/security-scan.yml
index eaa39f0..bf745dc 100644
--- a/.github/workflows/security-scan.yml
+++ b/.github/workflows/security-scan.yml
@@ -40,6 +40,6 @@ jobs:
     #
     # Pin includes canonical .affine language detection and preserves
     # JSON.parseExn coverage after the ReScript-to-AffineScript migration.
-    uses: hyperpolymath/panic-attack/.github/workflows/scan-and-report.yml@edf782bc5e9810de623a9dcacfa672df6de641a0 # main 2026-08-24
+    uses: hyperpolymath/panic-attack/.github/workflows/scan-and-report.yml@5e7575340961a21098d8d9600461038897016a4d # main 2026-08-24
     secrets:
       VERISIMDB_PAT: ${{ secrets.VERISIMDB_PAT }}