diff --git a/.changeset/sweet-ants-lick.md b/.changeset/sweet-ants-lick.md
new file mode 100644
index 00000000000..d4bc49bea3c
--- /dev/null
+++ b/.changeset/sweet-ants-lick.md
@@ -0,0 +1,5 @@
+---
+"@tiptap/extension-code-block-lowlight": patch
+---
+
+Add support for lowlight v3 aliases
diff --git a/packages/extension-code-block-lowlight/src/lowlight-plugin.ts b/packages/extension-code-block-lowlight/src/lowlight-plugin.ts
index 5280ca5d9f2..e55ed566bc5 100644
--- a/packages/extension-code-block-lowlight/src/lowlight-plugin.ts
+++ b/packages/extension-code-block-lowlight/src/lowlight-plugin.ts
@@ -49,7 +49,7 @@ function getDecorations({
     const language = block.node.attrs.language || defaultLanguage
     const languages = lowlight.listLanguages()
 
-    const nodes = language && (languages.includes(language) || registered(language))
+    const nodes = language && (languages.includes(language) || registered(language) || lowlight.registered?.(language))
       ? getHighlightNodes(lowlight.highlight(language, block.node.textContent))
       : getHighlightNodes(lowlight.highlightAuto(block.node.textContent))