diff --git a/.github/workflows/deploy-docs.yml b/.github/workflows/deploy-docs.yml
index 9e85615934..f6c6c6a06d 100644
--- a/.github/workflows/deploy-docs.yml
+++ b/.github/workflows/deploy-docs.yml
@@ -18,7 +18,7 @@ jobs:
         with:
           fetch-depth: 0
       - name: Install mdbook
-        uses: taiki-e/install-action@v2.19.2
+        uses: taiki-e/install-action@v2.21.6
         with:
           tool: mdbook,mdbook-mermaid
       - name: Deploy GitHub Pages
diff --git a/.github/workflows/llvm-cov.yml b/.github/workflows/llvm-cov.yml
index 5194f50c3f..77759163b8 100644
--- a/.github/workflows/llvm-cov.yml
+++ b/.github/workflows/llvm-cov.yml
@@ -39,7 +39,7 @@ jobs:
       - uses: Swatinem/rust-cache@v2
 
       - name: Install cargo-llvm-cov
-        uses: taiki-e/install-action@v2.19.2
+        uses: taiki-e/install-action@v2.21.6
         with:
           tool: cargo-llvm-cov