diff --git a/packages/core/src/commands/insertHTML.ts b/packages/core/src/commands/insertHTML.ts
index 68046a3d..881c4138 100644
--- a/packages/core/src/commands/insertHTML.ts
+++ b/packages/core/src/commands/insertHTML.ts
@@ -1,22 +1,8 @@
 import { DOMParser } from 'prosemirror-model'
-import { Selection, Transaction } from 'prosemirror-state'
-import { ReplaceStep, ReplaceAroundStep } from 'prosemirror-transform'
 import elementFromString from '../utilities/elementFromString'
+import selectionToInsertionEnd from '../helpers/selectionToInsertionEnd'
 import { Command, RawCommands } from '../types'
 
-// TODO: move to utils
-// https://github.com/ProseMirror/prosemirror-state/blob/master/src/selection.js#L466
-function selectionToInsertionEnd(tr: Transaction, startLen: number, bias: number) {
-  const last = tr.steps.length - 1
-  if (last < startLen) return
-  const step = tr.steps[last]
-  if (!(step instanceof ReplaceStep || step instanceof ReplaceAroundStep)) return
-  const map = tr.mapping.maps[last]
-  let end = 0
-  map.forEach((_from, _to, _newFrom, newTo) => { if (end === 0) end = newTo })
-  tr.setSelection(Selection.near(tr.doc.resolve(end as unknown as number), bias))
-}
-
 declare module '@tiptap/core' {
   interface Commands {
     insertHTML: {
diff --git a/packages/core/src/helpers/selectionToInsertionEnd.ts b/packages/core/src/helpers/selectionToInsertionEnd.ts
new file mode 100644
index 00000000..faa46365
--- /dev/null
+++ b/packages/core/src/helpers/selectionToInsertionEnd.ts
@@ -0,0 +1,28 @@
+import { Selection, Transaction } from 'prosemirror-state'
+import { ReplaceStep, ReplaceAroundStep } from 'prosemirror-transform'
+
+// source: https://github.com/ProseMirror/prosemirror-state/blob/master/src/selection.js#L466
+export default function selectionToInsertionEnd(tr: Transaction, startLen: number, bias: number) {
+  const last = tr.steps.length - 1
+
+  if (last < startLen) {
+    return
+  }
+
+  const step = tr.steps[last]
+
+  if (!(step instanceof ReplaceStep || step instanceof ReplaceAroundStep)) {
+    return
+  }
+
+  const map = tr.mapping.maps[last]
+  let end = 0
+
+  map.forEach((_from, _to, _newFrom, newTo) => {
+    if (end === 0) {
+      end = newTo
+    }
+  })
+
+  tr.setSelection(Selection.near(tr.doc.resolve(end), bias))
+}