diff --git a/shell.nix b/shell.nix
index f8184f0..c14461a 100644
--- a/shell.nix
+++ b/shell.nix
@@ -5,7 +5,8 @@ in
 mkShell {
   buildInputs = [
     run-code-inline
-    asciidoctor
+    # asciidoctor
+    asciidoctor-with-extensions
     # python311Packages.pygments don't need to install, asciidoctor includes it
     # rubyPackages.coderay
     # rubyPackages.rouge