diff --git a/packages/core/spec/share/asciidoctor-spec.cjs b/packages/core/spec/share/asciidoctor-spec.cjs
index 429c6f65b..59962db56 100644
--- a/packages/core/spec/share/asciidoctor-spec.cjs
+++ b/packages/core/spec/share/asciidoctor-spec.cjs
@@ -2059,6 +2059,36 @@ America/New_York
         expect(html).to.include('<pre>Europe/London\nAmerica/New_York</pre>')
         expect(html).to.include('<style>pre.prism{background-color: lightgrey}</style>')
       })
+
+      it('should call super.format', () => {
+        class BuildHighlighter {
+          format (node, lang, opts) {
+            opts = Object.assign({}, opts, {
+              transform: (x, code) => {
+                code['$[]=']('class', `language-${lang || 'none'} hljs`)
+              },
+            })
+            return this.super({ caller: 'format' }, node, lang, opts)
+          }
+
+          handlesHighlighting () { return true }
+
+          highlight (node, source, lang, opts) {
+            return `<span>${source}</span><span>${lang}</span>`
+          }
+        }
+
+        asciidoctor.SyntaxHighlighter.register('build', BuildHighlighter)
+        const source = `[source,ruby]
+----
+puts 'Hello, World!'
+----`
+        const doc = asciidoctor.load(source, { attributes: { 'source-highlighter': 'build' } })
+        const html = doc.convert({ standalone: true })
+        expect(html).to.include('<pre lang="ruby" class="prism wrap"><code>puts \'Hello, World!\'</code></pre>')
+        expect(html).to.include('<pre>Europe/London\nAmerica/New_York</pre>')
+        expect(html).to.include('<style>pre.prism{background-color: lightgrey}</style>')
+      })
     })
 
     describe('Table', function () {
diff --git a/packages/core/src/asciidoctor-core-api.js b/packages/core/src/asciidoctor-core-api.js
index 2dc6e5efd..e95e0df65 100644
--- a/packages/core/src/asciidoctor-core-api.js
+++ b/packages/core/src/asciidoctor-core-api.js
@@ -268,6 +268,17 @@ function initializeClass (superClass, className, functions, defaultFunctions, ar
   }
   Opal.def(scope, '$initialize', initialize)
   Opal.def(scope, 'super', function (func) {
+    if (typeof func === 'object' && typeof func.caller === 'string') {
+      const caller = func.caller
+      const argumentsList = Array.from(arguments).slice(1)
+      for (let i = 0; i < argumentsList.length; i++) {
+        // convert all (Opal) Hash arguments to JSON.
+        if (typeof argumentsList[i] === 'object' && typeof argumentsList[i].constructor === 'function' && typeof argumentsList[i].constructor.name === 'Object') {
+          argumentsList[i] = toHash(argumentsList[i])
+        }
+      }
+      return Opal.send(this, Opal.find_super_dispatcher(this, caller, this[`$${caller}`]), argumentsList)
+    }
     if (typeof func === 'function') {
       Opal.send(this, Opal.find_super_dispatcher(this, func.name, func))
     } else {