diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 3c0853b..dba7c49 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -21,7 +21,7 @@ jobs:
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
     # Check out the repository under $GITHUB_WORKSPACE
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     
     # Install and set up R
     - uses: r-lib/actions/setup-r@v2
@@ -57,7 +57,7 @@ jobs:
     # Upload the check directory as an artefact on failure
     - name: Upload check results
       if: failure()
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: ${{ matrix.os }}-results
         path: Rcheck
@@ -70,7 +70,7 @@ jobs:
     runs-on: ubuntu-latest
     
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     
     - name: Compile standalone programs
       run: cd standalone && make -f nii_info.make
@@ -85,7 +85,7 @@ jobs:
     runs-on: windows-latest
     
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     
     # Set up Developer Command Prompt to see MSVC commands
     - uses: ilammy/msvc-dev-cmd@v1