diff --git a/ts/editor/codable.ts b/ts/editor/codable.ts
index af9916555..f243085be 100644
--- a/ts/editor/codable.ts
+++ b/ts/editor/codable.ts
@@ -20,6 +20,7 @@ const codeMirrorOptions = {
     gutters: ["CodeMirror-linenumbers", "CodeMirror-foldgutter"],
     matchTags: { bothTags: true },
     autoCloseTags: true,
+    extraKeys: { Tab: false, "Shift-Tab": false },
     viewportMargin: Infinity,
 };