diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 97a5cf1..90b3669 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -34,7 +34,7 @@ jobs:
 
     steps:
       - name: "Check out the repo"
-        uses: "actions/checkout@v3"
+        uses: "actions/checkout@v4"
 
       - name: "Set up Python"
         id: "setup-python"
@@ -102,7 +102,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: "Check out the repo"
-        uses: "actions/checkout@v3"
+        uses: "actions/checkout@v4"
 
       - name: "Set up Python"
         uses: "actions/setup-python@v4"
@@ -150,7 +150,7 @@ jobs:
 
     steps:
       - name: "Check out the repo"
-        uses: "actions/checkout@v3"
+        uses: "actions/checkout@v4"
 
       - name: "Set up Python"
         uses: "actions/setup-python@v4"
@@ -174,7 +174,7 @@ jobs:
 
     steps:
       - name: "Check out the repo"
-        uses: "actions/checkout@v3"
+        uses: "actions/checkout@v4"
 
       - name: "Set up Python"
         uses: "actions/setup-python@v4"