diff --git a/mkdocs-readthedocs.yml b/mkdocs-readthedocs.yml
index c669a8c2..f5b3984f 100644
--- a/mkdocs-readthedocs.yml
+++ b/mkdocs-readthedocs.yml
@@ -31,9 +31,6 @@ markdown_extensions:
   - pymdownx.emoji:
       emoji_index: !!python/name:pymdownx.emoji.twemoji
       emoji_generator: !!python/name:pymdownx.emoji.to_svg
-  - pymdownx.emoji:
-      emoji_index: !!python/name:materialx.emoji.twemoji
-      emoji_generator: !!python/name:materialx.emoji.to_svg
   - pymdownx.inlinehilite
   - pymdownx.magiclink
   - pymdownx.mark