diff --git a/dwhm/_extensions/dwhtml/_extension.yml b/dwhm/_extension.yml
similarity index 88%
rename from dwhm/_extensions/dwhtml/_extension.yml
rename to dwhm/_extension.yml
index 0aa3455..d9e3179 100644
--- a/dwhm/_extensions/dwhtml/_extension.yml
+++ b/dwhm/_extension.yml
@@ -4,6 +4,6 @@ version: 1.0.0
 quarto-required: ">=1.7.0"
 contributes:
   formats:
-    elsevier-html:
+    html:
       toc: true
       css: _extensions/drwater/dwhm/dwhm.css
diff --git a/dwhm/_extensions/dwhm/_extension.yml b/dwhm/_extensions/dwhm/_extension.yml
new file mode 100644
index 0000000..d9e3179
--- /dev/null
+++ b/dwhm/_extensions/dwhm/_extension.yml
@@ -0,0 +1,9 @@
+title: html
+author: ming
+version: 1.0.0
+quarto-required: ">=1.7.0"
+contributes:
+  formats:
+    html:
+      toc: true
+      css: _extensions/drwater/dwhm/dwhm.css
diff --git a/dwhm/_extensions/dwhtml/dwhm.css b/dwhm/_extensions/dwhm/dwhm.css
similarity index 100%
rename from dwhm/_extensions/dwhtml/dwhm.css
rename to dwhm/_extensions/dwhm/dwhm.css
diff --git a/dwhm/template.qmd b/dwhm/template.qmd
index 1add452..aaee17c 100644
--- a/dwhm/template.qmd
+++ b/dwhm/template.qmd
@@ -1,7 +1,7 @@
 ---
 title: Untitled
 format:
-  dwhtml-html: default
+  dwhm-html: default
 author: Ming Su
 date: last-modified
 ---