diff --git a/sketches/DHT_Simulator/.github/workflows/arduino-lint.yml b/sketches/DHT_Simulator/.github/workflows/arduino-lint.yml
index b2ca058c..870a1769 100644
--- a/sketches/DHT_Simulator/.github/workflows/arduino-lint.yml
+++ b/sketches/DHT_Simulator/.github/workflows/arduino-lint.yml
@@ -6,7 +6,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: arduino/arduino-lint-action@v1
         with:
           library-manager: update
diff --git a/sketches/DHT_Simulator/.github/workflows/arduino_test_runner.yml b/sketches/DHT_Simulator/.github/workflows/arduino_test_runner.yml
index 096b975b..5506eb6a 100644
--- a/sketches/DHT_Simulator/.github/workflows/arduino_test_runner.yml
+++ b/sketches/DHT_Simulator/.github/workflows/arduino_test_runner.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: 2.6
diff --git a/sketches/DHT_Simulator/.github/workflows/jsoncheck.yml b/sketches/DHT_Simulator/.github/workflows/jsoncheck.yml
index 04603d08..beb88295 100644
--- a/sketches/DHT_Simulator/.github/workflows/jsoncheck.yml
+++ b/sketches/DHT_Simulator/.github/workflows/jsoncheck.yml
@@ -10,7 +10,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: json-syntax-check
         uses: limitusus/json-syntax-check@v1
         with: