diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 02815f4..1a39a2f 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -10,7 +10,7 @@ jobs:
     name: Test run action (triggers warnings)
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ./
       with:
         path: example
@@ -21,7 +21,7 @@ jobs:
     name: Test run action (valid)
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ./
       with:
         path: example_valid
@@ -30,7 +30,7 @@ jobs:
     name: Test run action (valid with custom Flake8)
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - run: pip install flake8==3.8.0
     - uses: ./
       with:
@@ -40,7 +40,7 @@ jobs:
     name: Test run action (valid with Flake 3.8.0)
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ./
       with:
         path: example_valid
@@ -50,8 +50,8 @@ jobs:
     name: Test run action (valid with Python 3.9)
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-python@v3
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v5
       with:
         python-version: 3.9
     - uses: ./
@@ -62,31 +62,31 @@ jobs:
     name: Test run action (plugins)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: ./
-        with:
-          plugins: flake8-bugbear
-          path: example_bugbear
-          only_warn: 1
+    - uses: actions/checkout@v4
+    - uses: ./
+      with:
+        plugins: flake8-bugbear
+        path: example_bugbear
+        only_warn: 1
 
   run_action_with_classes:
     name: Test run action (classes)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: ./
-        with:
-          plugins: flake8-bugbear
-          path: example_bugbear
-          warning_classes: E,F
-          error_classes: W,B
-          only_warn: 1
+    - uses: actions/checkout@v4
+    - uses: ./
+      with:
+        plugins: flake8-bugbear
+        path: example_bugbear
+        warning_classes: E,F
+        error_classes: W,B
+        only_warn: 1
 
   run_action_with_extra_arguments:
     name: Test run action (extra arguments)
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ./
       with:
         path: example_length
@@ -96,7 +96,7 @@ jobs:
     name: Check for spelling errors
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: codespell-project/actions-codespell@master
       with:
         check_filenames: true