diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 5b89b07..0510801 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: windows-2019
     steps:
       - name: Checkout
-        uses: actions/checkout@v2.3.5
+        uses: actions/checkout@v2.4.0
       - name: Install Python
         uses: actions/setup-python@v2.2.2
         with:
@@ -32,7 +32,7 @@ jobs:
     runs-on: windows-2019
     steps:
       - name: Checkout
-        uses: actions/checkout@v2.3.5
+        uses: actions/checkout@v2.4.0
       - name: Install Python
         uses: actions/setup-python@v2.2.2
         with:
@@ -56,7 +56,7 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
      - name: Checkout
-       uses: actions/checkout@v2.3.5
+       uses: actions/checkout@v2.4.0
      - name: Install Python
        uses: actions/setup-python@v2.2.2
        with:
@@ -86,7 +86,7 @@ jobs:
     runs-on: macOS-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2.3.5
+        uses: actions/checkout@v2.4.0
       - name: Install Python
         uses: actions/setup-python@v2.2.2
         with:
@@ -113,7 +113,7 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
      - name: Checkout
-       uses: actions/checkout@v2.3.5
+       uses: actions/checkout@v2.4.0
      - name: Install Python
        uses: actions/setup-python@v2.2.2
        with:
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index d52009a..8054bf9 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -25,7 +25,7 @@ jobs:
           - id: isort
             name: Check import order with isort
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.4.0
       - name: Set up Python
         uses: actions/setup-python@v2
         id: python
diff --git a/.github/workflows/release-assets.yml b/.github/workflows/release-assets.yml
index 2ff47c3..e0eb110 100644
--- a/.github/workflows/release-assets.yml
+++ b/.github/workflows/release-assets.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: windows-2019
     steps:
       - name: Checkout
-        uses: actions/checkout@v2.3.5
+        uses: actions/checkout@v2.4.0
       - name: Install Python
         uses: actions/setup-python@v2.2.2
         with:
@@ -34,7 +34,7 @@ jobs:
     runs-on: windows-2019
     steps:
       - name: Checkout
-        uses: actions/checkout@v2.3.5
+        uses: actions/checkout@v2.4.0
       - name: Install Python
         uses: actions/setup-python@v2.2.2
         with:
@@ -61,7 +61,7 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v2.3.5
+        uses: actions/checkout@v2.4.0
       - name: Install Python
         uses: actions/setup-python@v2.2.2
         with:
@@ -94,7 +94,7 @@ jobs:
     runs-on: macOS-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2.3.5
+        uses: actions/checkout@v2.4.0
       - name: Install Python
         uses: actions/setup-python@v2.2.2
         with: