+* The `GFMDataProcessor()` requires the view document instance as its first parameter.
+
+### Other changes
+
+* Adjusted the data processor implementation to changes in `ckeditor5-engine`. See [ckeditor/ckeditor5#6091](https://github.com/ckeditor/ckeditor5/issues/6091). ([ce2cc01](https://github.com/ckeditor/ckeditor5-markdown-gfm/commit/ce2cc01))