diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 40ed1a9..58b24d2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -77,7 +77,7 @@ jobs:
           cache: false
       - uses: Swatinem/rust-cache@e18b497796c12c097a38f9edb9d0641fb99eee32 # v2
       - name: Install cargo-nextest
-        uses: taiki-e/install-action@41049aa56687c35e0afa74eed4f09cec4f9afabf # v2.85.2
+        uses: taiki-e/install-action@ba47c86ac325773530516bb756137ac718732518 # v2.86.5
         with:
           tool: nextest
       - name: Test workspace
diff --git a/.github/workflows/release-please.yml b/.github/workflows/release-please.yml
index 2907c16..2aa9437 100644
--- a/.github/workflows/release-please.yml
+++ b/.github/workflows/release-please.yml
@@ -49,7 +49,7 @@ jobs:
           upload-release-assets: false
 
       - name: Attest source provenance
-        uses: actions/attest-build-provenance@a2bbfa25375fe432b6a289bc6b6cd05ecd0c4c32 # v4.1.0
+        uses: actions/attest-build-provenance@4d101475d8b20a2381f78447822ac1eab6504dd8 # v4.2.2
         with:
           subject-path: ${{ steps.source.outputs.archive }}
 
diff --git a/.github/workflows/security.yml b/.github/workflows/security.yml
index 217ac7e..92177ec 100644
--- a/.github/workflows/security.yml
+++ b/.github/workflows/security.yml
@@ -40,7 +40,7 @@ jobs:
       - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           persist-credentials: false # PROJECT: security hardening -- never expose token to steps
-      - uses: EmbarkStudios/cargo-deny-action@bb137d7af7e4fb67e5f82a49c4fce4fad40782fe # v2.0.20
+      - uses: EmbarkStudios/cargo-deny-action@3c6349835b2b7b196a839186cb8b78e02f7b5f25 # v2.1.1
         with:
           # WHY: run every check explicitly so a schema regression in one
           # section can't silently disable the others. cargo-deny expects
@@ -71,7 +71,7 @@ jobs:
 
   osv-scanner:
     name: osv scanner
-    uses: google/osv-scanner-action/.github/workflows/osv-scanner-reusable.yml@9a498708959aeaef5ef730655706c5a1df1edbc2
+    uses: google/osv-scanner-action/.github/workflows/osv-scanner-reusable.yml@6e4298ebc4db23e847df9b2e2de2939d6f066c67
     permissions:
       actions: read
       contents: read