diff --git a/.github/workflows/api-test.yml b/.github/workflows/api-test.yml
index 8a7e738..154fd02 100644
--- a/.github/workflows/api-test.yml
+++ b/.github/workflows/api-test.yml
@@ -61,7 +61,7 @@ jobs:
         echo "✓ OpenAPI spec valid JSON"
     
     - name: Upload OpenAPI spec
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v6
       with:
         name: openapi-spec
         path: openapi.json
diff --git a/.github/workflows/model-training.yml b/.github/workflows/model-training.yml
index adc1ffc..23d3605 100644
--- a/.github/workflows/model-training.yml
+++ b/.github/workflows/model-training.yml
@@ -58,7 +58,7 @@ jobs:
         "
     
     - name: Upload trained model
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v6
       with:
         name: trained-models
         path: models/*.pth