diff --git a/.github/workflows/deploy_branch.yml b/.github/workflows/deploy_branch.yml
index f4846e7c53..089cbad6e5 100644
--- a/.github/workflows/deploy_branch.yml
+++ b/.github/workflows/deploy_branch.yml
@@ -28,7 +28,7 @@ jobs:
         scripts/buildSdist.sh
 
     - name: "Upload artifact: sdist"
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: sdist
         path: python/sdist/dist/amici-*.gz
diff --git a/.github/workflows/test_benchmark_collection_models.yml b/.github/workflows/test_benchmark_collection_models.yml
index a6a868dbf8..3663051eb3 100644
--- a/.github/workflows/test_benchmark_collection_models.yml
+++ b/.github/workflows/test_benchmark_collection_models.yml
@@ -85,7 +85,7 @@ jobs:
       run: |
           python3 tests/benchmark_models/evaluate_benchmark.py
 
-    - uses: actions/upload-artifact@v5
+    - uses: actions/upload-artifact@v6
       with:
         name: computation-times-${{ matrix.python-version }}-${{ matrix.extract_subexpressions }}
         path: |
diff --git a/.github/workflows/test_performance.yml b/.github/workflows/test_performance.yml
index 1a3c872a22..647198c20a 100644
--- a/.github/workflows/test_performance.yml
+++ b/.github/workflows/test_performance.yml
@@ -55,7 +55,7 @@ jobs:
         AMICI_IMPORT_NPROCS=2 check_time.sh petab_import python tests/performance/test.py import
 
     - name: "Upload artifact: CS_Signalling_ERBB_RAS_AKT_petab"
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: model_performance_test
         path: model_performance_test
diff --git a/.github/workflows/test_sbml_semantic_test_suite.yml b/.github/workflows/test_sbml_semantic_test_suite.yml
index 29b00ea929..f1656d95d9 100644
--- a/.github/workflows/test_sbml_semantic_test_suite.yml
+++ b/.github/workflows/test_sbml_semantic_test_suite.yml
@@ -47,7 +47,7 @@ jobs:
     - run: AMICI_PARALLEL_COMPILE="" ./scripts/run-SBMLTestsuite.sh ${{ matrix.cases }}
 
     - name: "Upload artifact: SBML semantic test suite results"
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: amici-semantic-results-${{ matrix.cases }}
         path: tests/sbml/amici-semantic-results
diff --git a/.github/workflows/test_sbml_semantic_test_suite_jax.yml b/.github/workflows/test_sbml_semantic_test_suite_jax.yml
index d9af9235ce..61e30cd309 100644
--- a/.github/workflows/test_sbml_semantic_test_suite_jax.yml
+++ b/.github/workflows/test_sbml_semantic_test_suite_jax.yml
@@ -45,7 +45,7 @@ jobs:
     - run: ./scripts/run-SBMLTestsuite.sh --jax ${{ matrix.cases }}
 
     - name: "Upload artifact: SBML semantic test suite results"
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: amici-semantic-results-jax-${{ matrix.cases }}
         path: tests/sbml/amici-semantic-results-jax