diff --git a/.github/workflows/check-urls.yml b/.github/workflows/check-urls.yml
index 77c84160..1f62251f 100644
--- a/.github/workflows/check-urls.yml
+++ b/.github/workflows/check-urls.yml
@@ -30,8 +30,8 @@ jobs:
         print_all: false
         timeout: 2
         retry_count# : 2
-        exclude_urls: https://github.com/pytorch/pytorch/pull/117009,https://github.com/huggingface/transformers/pull/29285,https://github.com/pytorch/pytorch/blob/a44f8894fa6d973693aab44a3dda079a168b05c1/torch/_decomp/decompositions.py#L1475,https://github.com/huggingface/transformers/pull/36652
-        exclude_patterns: https://dumps.wikimedia.org/,https://github.com/,https://huggingface.co/,https://huggingface.co/
+        exclude_urls: https://github.com/pytorch/pytorch/pull/117009,https://github.com/huggingface/transformers/pull/29285,https://github.com/pytorch/pytorch/blob/a44f8894fa6d973693aab44a3dda079a168b05c1/torch/_decomp/decompositions.py#L1475,https://github.com/huggingface/transformers/pull/36652,https://www.ilankelman.org/stopsigns/australia.jpg
+        exclude_patterns: https://dumps.wikimedia.org/,https://github.com/,https://huggingface.co/,https://huggingface.co/,https://www.ilankelman.org/stopsigns/australia.jpg
         # force_pass : true
 
     - name: urls-checker-docs
diff --git a/.github/workflows/documentation.yml b/.github/workflows/documentation.yml
index c6de0b91..6a87645d 100644
--- a/.github/workflows/documentation.yml
+++ b/.github/workflows/documentation.yml
@@ -109,9 +109,9 @@ jobs:
             grep ERROR doc.txt | grep -v 'l-plot-tiny-llm-export' | grep -v 'Unexpected section title or transition.'
             exit 1
           fi
-          if [[ $(grep WARNING doc.txt | grep -v 'l-plot-tiny-llm-export' | grep -v 'Inline emphasis start-string' | grep -v 'Definition list ends without a blank line' | grep -v 'Unexpected section title or transition' | grep -v 'Inline strong start-string' | grep -v 'MambaCache' ) ]]; then
+          if [[ $(grep WARNING doc.txt | grep -v 'l-plot-tiny-llm-export' | grep -v 'Inline emphasis start-string' | grep -v 'Definition list ends without a blank line' | grep -v 'Unexpected section title or transition' | grep -v 'Inline strong start-string' | grep -v 'MambaCache' | grep -v 'duplicate label patch-_patched_patch_transformers-common' ) ]]; then
             echo "Documentation produces warnings."
-            grep WARNING doc.txt | grep -v 'l-plot-tiny-llm-export' | grep -v 'Inline emphasis start-string' | grep -v 'Definition list ends without a blank line' | grep -v 'Unexpected section title or transition' | grep -v 'Inline strong start-string' | grep -v 'MambaCache'
+            grep WARNING doc.txt | grep -v 'l-plot-tiny-llm-export' | grep -v 'Inline emphasis start-string' | grep -v 'Definition list ends without a blank line' | grep -v 'Unexpected section title or transition' | grep -v 'Inline strong start-string' | grep -v 'MambaCache' | grep -v 'duplicate label patch-_patched_patch_transformers-common'
             exit 1
           fi
 
diff --git a/CHANGELOGS.rst b/CHANGELOGS.rst
index 09ecf385..789673d2 100644
--- a/CHANGELOGS.rst
+++ b/CHANGELOGS.rst
@@ -4,6 +4,7 @@ Change Logs
 0.9.1
 +++++
 
+* :pr:`409`: improves ModelBuilder wrapper
 * :pr:`408`: fix torch_deepcopy for empty DynamicCache and transformers==5.1.0, 5.2.0 (see https://github.com/huggingface/transformers/pull/43765/)
 
 0.9.0
diff --git a/onnx_diagnostic/helpers/model_builder_helper.py b/onnx_diagnostic/helpers/model_builder_helper.py
index fa34e4d4..fa6f4186 100644
--- a/onnx_diagnostic/helpers/model_builder_helper.py
+++ b/onnx_diagnostic/helpers/model_builder_helper.py
@@ -310,7 +310,8 @@ def _post(onnx_model):
             if not hasattr(config, key):
                 setattr(config, key, getattr(text_config, key))
     elif config.architectures[0] == "GptOssForCausalLM":
-        delattr(config, "quantization_config")
+        if hasattr(config, "quantization_config"):
+            delattr(config, "quantization_config")
     elif (
         config.architectures[0] == "PhiMoEForCausalLM"
         and config.max_position_embeddings != config.original_max_position_embeddings