diff --git a/.github/workflows/ci_main.yml b/.github/workflows/ci_main.yml
index 00f9289..98725b9 100644
--- a/.github/workflows/ci_main.yml
+++ b/.github/workflows/ci_main.yml
@@ -193,7 +193,7 @@ jobs:
                 components: llvm-tools-preview
 
             - name: Install cargo-llvm-cov
-              uses: taiki-e/install-action@cde8c9e634f4a17bc06b61413ac0ef75450eac46 # v2.81.4
+              uses: taiki-e/install-action@fd2f5e3d644b484055ebf4268f474c565f148f25 # v2.81.9
               with:
                 tool: cargo-llvm-cov
 
diff --git a/.github/workflows/ci_pr.yml b/.github/workflows/ci_pr.yml
index 7cf7c1a..07b1263 100644
--- a/.github/workflows/ci_pr.yml
+++ b/.github/workflows/ci_pr.yml
@@ -148,7 +148,7 @@ jobs:
                 components: llvm-tools-preview
 
             - name: Install cargo-llvm-cov
-              uses: taiki-e/install-action@cde8c9e634f4a17bc06b61413ac0ef75450eac46 # v2.81.4
+              uses: taiki-e/install-action@fd2f5e3d644b484055ebf4268f474c565f148f25 # v2.81.9
               with:
                 tool: cargo-llvm-cov