diff --git a/src/public/javascripts/services/note_detail_code.js b/src/public/javascripts/services/note_detail_code.js
index 00b52194d..5a9baf2b3 100644
--- a/src/public/javascripts/services/note_detail_code.js
+++ b/src/public/javascripts/services/note_detail_code.js
@@ -16,6 +16,10 @@ async function show() {
         CodeMirror.keyMap.default["Shift-Tab"] = "indentLess";
         CodeMirror.keyMap.default["Tab"] = "indentMore";
 
+        // these conflict with backward/forward navigation shortcuts
+        delete CodeMirror.keyMap.default["Alt-Left"];
+        delete CodeMirror.keyMap.default["Alt-Right"];
+
         CodeMirror.modeURL = 'libraries/codemirror/mode/%N/%N.js';
 
         codeEditor = CodeMirror($noteDetailCode[0], {