diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 25b1b17..2ee1cc8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -191,7 +191,7 @@ jobs:
         # snapshot-hygiene gate, `cargo ci-snapshot`); avoids a from-source
         # compile on every CI run. taiki-e/install-action verifies release
         # checksums, unlike a raw `curl | tar`.
-        uses: taiki-e/install-action@07b4745e0c39a41822af610387492e3e53aa222b # v2.83.4
+        uses: taiki-e/install-action@a6b2e2dcd845ddd7f509ce4f3ed3d922b80cc5d9 # v2.84.0
         with:
           tool: nextest@0.9.140,cargo-deny@0.20.2,cargo-insta@1.48.0
 
diff --git a/.github/workflows/mutants.yml b/.github/workflows/mutants.yml
index 9e220e0..95449f8 100644
--- a/.github/workflows/mutants.yml
+++ b/.github/workflows/mutants.yml
@@ -34,7 +34,7 @@ jobs:
       - name: Install pinned Rust tools (checksum-verified)
         # nextest is the test runner used by cargo-mutants. taiki-e/install-action
         # verifies release checksums, unlike a raw `curl | tar`.
-        uses: taiki-e/install-action@07b4745e0c39a41822af610387492e3e53aa222b # v2.83.4
+        uses: taiki-e/install-action@a6b2e2dcd845ddd7f509ce4f3ed3d922b80cc5d9 # v2.84.0
         with:
           tool: nextest@0.9.140,cargo-mutants@27.1.0
 
diff --git a/.github/workflows/scorecard.yml b/.github/workflows/scorecard.yml
index c673722..c0dbaed 100644
--- a/.github/workflows/scorecard.yml
+++ b/.github/workflows/scorecard.yml
@@ -30,6 +30,6 @@ jobs:
           publish_results: true
 
       - name: Upload SARIF to GitHub Security tab
-        uses: github/codeql-action/upload-sarif@7188fc363630916deb702c7fdcf4e481b751f97a # v4.37.1
+        uses: github/codeql-action/upload-sarif@e0647621c2984b5ed2f768cb892365bf2a616ad1 # v4.37.2
         with:
           sarif_file: results.sarif