diff --git a/book/config/_quarto-html.yml b/book/config/_quarto-html.yml
index 26765154e..662d9acc4 100644
--- a/book/config/_quarto-html.yml
+++ b/book/config/_quarto-html.yml
@@ -365,7 +365,7 @@ crossref:
 
 filters:
   - ../config/lua/sidenote.lua             # ⚠️ INFO: In HTML, this should not needed.
-  - ../config/lua/inject-parts.lua
+  - ../config/lua/inject_parts.lua
   - ../config/lua/inject_quizzes.lua
   - pandoc-ext/diagram
   #- ../config/lua/inject_crossrefs.lua    # ⚠️ WARNING: This must come before custom-numbered-blocks (relies on \ref{...})