diff --git a/package-lock.json b/package-lock.json
index 8fd209b..e8aeccd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "Heynote",
-  "version": "0.0.1",
+  "version": "1.0.0-dev",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "Heynote",
-      "version": "0.0.1",
+      "version": "1.0.0-dev",
       "devDependencies": {
         "@codemirror/commands": "^6.1.2",
         "@codemirror/lang-html": "^6.4.0",
@@ -18,6 +18,7 @@
         "@codemirror/lang-php": "^6.0.1",
         "@codemirror/lang-python": "^6.1.1",
         "@codemirror/lang-sql": "^6.3.3",
+        "@codemirror/language": "^6.4.0",
         "@codemirror/rangeset": "^0.19.9",
         "@codemirror/search": "^6.2.3",
         "@electron/asar": "^3.2.2",
@@ -205,9 +206,9 @@
       }
     },
     "node_modules/@codemirror/language": {
-      "version": "6.3.2",
-      "resolved": "https://registry.npmjs.org/@codemirror/language/-/language-6.3.2.tgz",
-      "integrity": "sha512-g42uHhOcEMAXjmozGG+rdom5UsbyfMxQFh7AbkeoaNImddL6Xt4cQDL0+JxmG7+as18rUAvZaqzP/TjsciVIrA==",
+      "version": "6.4.0",
+      "resolved": "https://registry.npmjs.org/@codemirror/language/-/language-6.4.0.tgz",
+      "integrity": "sha512-Wzb7GnNj8vnEtbPWiOy9H0m1fBtE28kepQNGLXekU2EEZv43BF865VKITUn+NoV8OpW6gRtvm29YEhqm46927Q==",
       "dev": true,
       "dependencies": {
         "@codemirror/state": "^6.0.0",
diff --git a/package.json b/package.json
index 9bef580..18d31a4 100644
--- a/package.json
+++ b/package.json
@@ -36,6 +36,7 @@
     "@codemirror/lang-php": "^6.0.1",
     "@codemirror/lang-python": "^6.1.1",
     "@codemirror/lang-sql": "^6.3.3",
+    "@codemirror/language": "^6.4.0",
     "@codemirror/rangeset": "^0.19.9",
     "@codemirror/search": "^6.2.3",
     "@electron/asar": "^3.2.2",
diff --git a/src/editor/block/note-block.js b/src/editor/block/note-block.js
index 4fd53fc..6128ef6 100644
--- a/src/editor/block/note-block.js
+++ b/src/editor/block/note-block.js
@@ -2,7 +2,7 @@ import { ViewPlugin, EditorView, Decoration, WidgetType, lineNumbers } from "@co
 import { layer, RectangleMarker } from "@codemirror/view"
 import { EditorState, RangeSetBuilder, StateField, Facet , StateEffect} from "@codemirror/state";
 import { RangeSet } from "@codemirror/rangeset";
-import { syntaxTree } from "@codemirror/language"
+import { syntaxTree, ensureSyntaxTree } from "@codemirror/language"
 import { Note, Document, NoteDelimiter } from "../lang-heynote/parser.terms.js"
 import { IterMode } from "@lezer/common";
 import { heynoteEvent, LANGUAGE_CHANGE } from "../annotation.js";
@@ -13,7 +13,8 @@ let firstBlockDelimiterSize
 
 function getBlocks(state) {
     const blocks = [];
-    syntaxTree(state).iterate({
+    
+    ensureSyntaxTree(state, state.doc.length).iterate({
         enter: (type) => {
             if (type.type.id == Document || type.type.id == Note) {
                 return true