diff --git a/demo/chat_pdf_streamlit_ui.py b/demo/chat_pdf_streamlit_ui.py
index 6001ec0..bdf3714 100644
--- a/demo/chat_pdf_streamlit_ui.py
+++ b/demo/chat_pdf_streamlit_ui.py
@@ -76,7 +76,7 @@
 @st.cache_data
 def load_favicon():
     # oori_logo[32px].png as a data URL
-    return 'data:image/png;base64,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'
+    return 'data:image/png;base64,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'  # noqa E501
 
 # Streamlit caching to save on repeat loads
 @st.cache_data