diff --git a/pkgs/by-name/as/asciidoctor-with-extensions/Gemfile b/pkgs/by-name/as/asciidoctor-with-extensions/Gemfile
index a13c8e6750bc..1aa6e1cd4dc3 100644
--- a/pkgs/by-name/as/asciidoctor-with-extensions/Gemfile
+++ b/pkgs/by-name/as/asciidoctor-with-extensions/Gemfile
@@ -11,3 +11,4 @@ gem 'asciidoctor-revealjs'
 gem 'coderay'
 gem 'pygments.rb'
 gem 'rouge'
+gem 'tilt'
diff --git a/pkgs/by-name/as/asciidoctor-with-extensions/Gemfile.lock b/pkgs/by-name/as/asciidoctor-with-extensions/Gemfile.lock
index 8983362c91ec..c9222a82c88e 100644
--- a/pkgs/by-name/as/asciidoctor-with-extensions/Gemfile.lock
+++ b/pkgs/by-name/as/asciidoctor-with-extensions/Gemfile.lock
@@ -129,6 +129,7 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.7)
     stringio (3.1.8)
     thread_safe (0.3.6)
+    tilt (2.6.1)
     time (0.4.1)
       date
     treetop (1.6.18)
@@ -152,6 +153,7 @@ DEPENDENCIES
   coderay
   pygments.rb
   rouge
+  tilt
 
 BUNDLED WITH
    2.7.2
diff --git a/pkgs/by-name/as/asciidoctor-with-extensions/gemset.nix b/pkgs/by-name/as/asciidoctor-with-extensions/gemset.nix
index a1f70de4e910..bc1f0bc87758 100644
--- a/pkgs/by-name/as/asciidoctor-with-extensions/gemset.nix
+++ b/pkgs/by-name/as/asciidoctor-with-extensions/gemset.nix
@@ -676,6 +676,16 @@
     };
     version = "0.3.6";
   };
+  tilt = {
+    groups = [ "default" ];
+    platforms = [ ];
+    source = {
+      remotes = [ "https://rubygems.org" ];
+      sha256 = "0w27v04d7rnxjr3f65w1m7xyvr6ch6szjj2v5wv1wz6z5ax9pa9m";
+      type = "gem";
+    };
+    version = "2.6.1";
+  };
   time = {
     dependencies = [ "date" ];
     groups = [ "default" ];