diff --git a/_vendors.yml b/_vendors.yml
index 65b74af..e2af5b1 100644
--- a/_vendors.yml
+++ b/_vendors.yml
@@ -47,12 +47,6 @@ copy_tex_js:
   file: dist/contrib/copy-tex.min.js
   alias: KaTeX
   integrity: sha256-etSqbSVF4+Lwe8MGk/Vanc1sR+mWv+qOG73fxWw9p94=
-copy_tex_css:
-  name: katex
-  version: 0.15.6
-  file: dist/contrib/copy-tex.min.css
-  alias: KaTeX
-  integrity: sha256-Wk20U9mS/kHGcSgkjSiRezW5exqT6wAOKwySOaLotXM=
 pjax:
   name: '@next-theme/pjax'
   version: 0.5.0
diff --git a/layout/_third-party/math/katex.njk b/layout/_third-party/math/katex.njk
index 354edb8..62a64c2 100644
--- a/layout/_third-party/math/katex.njk
+++ b/layout/_third-party/math/katex.njk
@@ -1,6 +1,5 @@
 {{ next_vendors('katex') }}
 {%- if theme.math.katex.copy_tex %}
-  {{ next_vendors('copy_tex_css') }}
   {{ next_data('katex', {
     copy_tex_js: theme.vendors.copy_tex_js
   }) }}