diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 3783d32..deee674 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -44,7 +44,7 @@ jobs:
       - uses: Swatinem/rust-cache@c19371144df3bb44fab255c43d04cbc2ab54d1c4 # post-v2.9.1
 
       - name: Install cargo-llvm-cov
-        uses: taiki-e/install-action@6c1f7cf125e42770ff087ea443901b487cc5471a # v2.79.5
+        uses: taiki-e/install-action@d9be7d8cda89035c9c843f78bd44d4f72d8403d4 # v2.79.7
         with:
           tool: cargo-llvm-cov
 
diff --git a/.github/workflows/sbom.yml b/.github/workflows/sbom.yml
index 50590e9..bb082be 100644
--- a/.github/workflows/sbom.yml
+++ b/.github/workflows/sbom.yml
@@ -82,7 +82,7 @@ jobs:
       # Scorecard's Signed-Releases check pattern-matches on the
       # `.sig` extension next to release assets.
       - name: Install cosign
-        uses: sigstore/cosign-installer@d7543c93d881b35a8faa02e8e3605f69b7a1ce62 # v3.10.0
+        uses: sigstore/cosign-installer@6f9f17788090df1f26f669e9d70d6ae9567deba6 # v4.1.2
 
       - name: Sign SBOMs with cosign (keyless)
         run: |