diff --git a/packages/extension-code-block-lowlight/src/code-block-lowlight.ts b/packages/extension-code-block-lowlight/src/code-block-lowlight.ts
index c52fe3e14..8bace6df9 100644
--- a/packages/extension-code-block-lowlight/src/code-block-lowlight.ts
+++ b/packages/extension-code-block-lowlight/src/code-block-lowlight.ts
@@ -16,9 +16,13 @@ export interface CodeBlockLowlightOptions extends CodeBlockOptions {
 export const CodeBlockLowlight = CodeBlock.extend<CodeBlockLowlightOptions>({
   addOptions() {
     return {
-      // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
-      ...this.parent!(),
+      ...this.parent?.(),
       lowlight: {},
+      languageClassPrefix: 'language-',
+      exitOnTripleEnter: true,
+      exitOnArrowDown: true,
+      defaultLanguage: null,
+      HTMLAttributes: {},
     }
   },