diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ddad5bf..bb99d0a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -91,7 +91,7 @@ jobs:
     steps:
       - uses: actions/checkout@v7
       - run: rustup toolchain install nightly --profile minimal && rustup default nightly
-      - uses: taiki-e/install-action@v2
+      - uses: taiki-e/install-action@v2.85.5
         with:
           tool: cargo-fuzz
       - uses: Swatinem/rust-cache@v2
diff --git a/.github/workflows/scheduled.yml b/.github/workflows/scheduled.yml
index 04e977e..6736cbf 100644
--- a/.github/workflows/scheduled.yml
+++ b/.github/workflows/scheduled.yml
@@ -24,7 +24,7 @@ jobs:
     steps:
       - uses: actions/checkout@v7
       - run: rustup toolchain install nightly --profile minimal && rustup default nightly
-      - uses: taiki-e/install-action@v2
+      - uses: taiki-e/install-action@v2.85.5
         with:
           tool: cargo-fuzz
       - name: fuzz each target