diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index e7a6669..9b32c0c 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: setup conda
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 07cf732..5c65db7 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -9,7 +9,7 @@ jobs:
   pre-commit:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: actions/setup-python@v5
       with:
           python-version: '3.9'
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index a436345..b0ac99a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -13,7 +13,7 @@ jobs:
         os: [macos-latest, windows-latest, ubuntu-latest]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: conda-incubator/setup-miniconda@v3
         with:
           auto-update-conda: true