diff --git a/src/constants.ts b/src/constants.ts
index e5a3b23..6f0d1a8 100644
--- a/src/constants.ts
+++ b/src/constants.ts
@@ -147,6 +147,10 @@ export interface RichTextListCheckNode extends RichTextListNode {
   listType: "check";
 }
 
+export interface RichTextLinebreakNode extends RichTextNode {
+  type: "linebreak";
+}
+
 export interface RichTextTextNode extends RichTextNode {
   type: "text";
   format: number;
@@ -218,6 +222,9 @@ export const isListNodeBulletListNode = (node: RichTextListNode): node is RichTe
 export const isListNodeCheckListNode = (node: RichTextListNode): node is RichTextListCheckNode =>
   node.listType === "check";
 
+export const isNodeLinebreakNode = (node: RichTextNode): node is RichTextLinebreakNode =>
+  node.type === "linebreak";
+
 export const isNodeTextNode = (node: RichTextNode): node is RichTextTextNode =>
   node.type === "text";