diff --git a/.github/workflows/cd.yml b/.github/workflows/cd.yml
index ae479d2..87d1af0 100644
--- a/.github/workflows/cd.yml
+++ b/.github/workflows/cd.yml
@@ -12,9 +12,9 @@ jobs:
   create-release:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
       # production release
-      - uses: taiki-e/create-gh-release-action@v1
+      - uses: taiki-e/create-gh-release-action@72d65cee1f8033ef0c8b5d79eaf0c45c7c578ce3
         with:
           # (optional) Path to changelog
           changelog: CHANGELOG.md
@@ -23,7 +23,7 @@ jobs:
         if: ${{ !contains(github.ref_name, '-') }}
       # development (pre)release
       # we do not need changelog changes
-      - uses: taiki-e/create-gh-release-action@v1
+      - uses: taiki-e/create-gh-release-action@72d65cee1f8033ef0c8b5d79eaf0c45c7c578ce3
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
         if: ${{ contains(github.ref_name, '-') }}
@@ -37,8 +37,8 @@ jobs:
           - windows-latest
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v4
-      - uses: taiki-e/upload-rust-binary-action@v1
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+      - uses: taiki-e/upload-rust-binary-action@4398438f25ce68e99e82e90744c88604b9b218a3
         with:
           # (required) Comma-separated list of binary names (non-extension portion of filename) to build and upload.
           # Note that glob pattern is not supported yet.
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 885d078..f72272a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,18 +10,18 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
 
       - name: Install stable toolchain
         uses: dtolnay/rust-toolchain@stable
 
       - name: Install NuShell
-        uses: hustcer/setup-nu@v3
+        uses: hustcer/setup-nu@c6d9051e49681bbb7df7eddd473c04d8bbcef9e1
 
       - name: Install Just
-        uses: extractions/setup-just@v2
+        uses: extractions/setup-just@dd310ad5a97d8e7b41793f8ef055398d51ad4de6
 
-      - uses: taiki-e/install-action@v2
+      - uses: taiki-e/install-action@6da51af62171044932d435033daa70a0eb3383ba
         with:
           tool: nextest
       - name: Run tests (nextest)
@@ -32,7 +32,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
 
       - name: Install stable toolchain
         # Pin based on current `rust-version` in Cargo.toml.
@@ -42,7 +42,7 @@ jobs:
           components: rustfmt, clippy
 
       - name: Install Just
-        uses: extractions/setup-just@v2
+        uses: extractions/setup-just@dd310ad5a97d8e7b41793f8ef055398d51ad4de6
 
       - name: Run just lint
         run: just lint