diff --git a/vizro-core/src/vizro/_vizro.py b/vizro-core/src/vizro/_vizro.py
index f2fa41a27..21ab82c6c 100644
--- a/vizro-core/src/vizro/_vizro.py
+++ b/vizro-core/src/vizro/_vizro.py
@@ -53,13 +53,6 @@ def __init__(self, **kwargs):
             use_pages=True,
         )
 
-        # Ensure external_stylesheets is a list and append the additional stylesheet
-        external_stylesheets = self.dash.config.external_stylesheets
-        self.dash.config.external_stylesheets = (
-            external_stylesheets if isinstance(external_stylesheets, list) else [external_stylesheets]
-        )
-        self.dash.config.external_stylesheets.append(dmc.styles.DATES)
-
         # When Vizro is used as a framework, we want to include the library and framework resources.
         # Dash serves resources in the order 1. external_stylesheets/scripts; 2. library resources from the
         # ComponentRegistry; 3. resources added by append_css/scripts.