diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index be2ad63..7a8ad81 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -34,7 +34,7 @@ jobs:
 #            name-modifier: 'with Coverage'
 #    steps:
 #      - name: Checkout code
-#        uses: actions/checkout@v3
+#        uses: actions/checkout@v4
 #        with:
 #          fetch-depth: 0
 #      - name: Setup Python
@@ -79,7 +79,7 @@ jobs:
 #
 #    steps:
 #      - name: Checkout code
-#        uses: actions/checkout@v3
+#        uses: actions/checkout@v4
 #        with:
 #          fetch-depth: 0
 #      - name: Setup Python
@@ -113,7 +113,7 @@ jobs:
 #
 #    steps:
 #      - name: Checkout code
-#        uses: actions/checkout@v3
+#        uses: actions/checkout@v4
 #        with:
 #          fetch-depth: 0
 #      - name: Setup Python
@@ -136,7 +136,7 @@ jobs:
         python: [ '3.7', '3.8', '3.9', '3.10', '3.11' ]
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Set up Python
@@ -158,7 +158,7 @@ jobs:
       - import-eigsolver
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Get history and tags for SCM versioning to work
         run: |
           git fetch --prune --unshallow