diff --git a/.github/workflows/ci-cpu-linux.yml b/.github/workflows/ci-cpu-linux.yml
index e7547ff8..0125240a 100644
--- a/.github/workflows/ci-cpu-linux.yml
+++ b/.github/workflows/ci-cpu-linux.yml
@@ -40,12 +40,12 @@ jobs:
 
     steps:
     - name: Checkout pbrt
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
       with:
         submodules: true
 
     - name: Checkout rgb2spectrum tables
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
       with:
         repository: mmp/rgb2spectrum
         path: build
diff --git a/.github/workflows/ci-cpu-macos.yml b/.github/workflows/ci-cpu-macos.yml
index 40351bad..3eef1f15 100644
--- a/.github/workflows/ci-cpu-macos.yml
+++ b/.github/workflows/ci-cpu-macos.yml
@@ -23,12 +23,12 @@ jobs:
 
     steps:
     - name: Checkout pbrt
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
       with:
         submodules: true
 
     - name: Checkout rgb2spectrum tables
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
       with:
         repository: mmp/rgb2spectrum
         path: build
diff --git a/.github/workflows/ci-cpu-windows.yml b/.github/workflows/ci-cpu-windows.yml
index 27e0e4d2..464eac25 100644
--- a/.github/workflows/ci-cpu-windows.yml
+++ b/.github/workflows/ci-cpu-windows.yml
@@ -23,12 +23,12 @@ jobs:
 
     steps:
     - name: Checkout pbrt
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
       with:
         submodules: true
 
     - name: Checkout rgb2spectrum tables
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
       with:
         repository: mmp/rgb2spectrum
         path: build
diff --git a/.github/workflows/ci-gpu.yml b/.github/workflows/ci-gpu.yml
index 9b853fbc..d256983d 100644
--- a/.github/workflows/ci-gpu.yml
+++ b/.github/workflows/ci-gpu.yml
@@ -23,8 +23,8 @@ jobs:
       fail-fast: false
       matrix:
         optix: [ optix-7.7.0, optix-8.1.0, optix-9.0.0 ]
-        cuda: [ '12.2.2', '12.6.3', '12.8.0', '12.9.1', '13.0.1' ]
-        os: [ ubuntu-24.04, ubuntu-20.04, windows-latest ]
+        cuda: [ '12.6.3', '12.8.0', '12.9.1', '13.0.1', '13.1.1', '13.2.0' ]
+        os: [ ubuntu-24.04, windows-latest ]
 
     name: GPU Build Only (${{ matrix.os }}, CUDA ${{ matrix.cuda }}, ${{ matrix.optix }})
 
@@ -42,18 +42,18 @@ jobs:
       run: nvcc -V
 
     - name: Checkout pbrt
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
       with:
         submodules: true
 
     - name: Checkout rgb2spectrum tables
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
       with:
         repository: mmp/rgb2spectrum
         path: build
 
     - name: Checkout OptiX headers
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
       with:
         ssh-key: ${{ secrets.CHECKOUT_KEY }}
         repository: mmp/optix-headers