diff --git a/lib/ace/commands/default_commands.js b/lib/ace/commands/default_commands.js
index 458d5582..b833f0ca 100644
--- a/lib/ace/commands/default_commands.js
+++ b/lib/ace/commands/default_commands.js
@@ -333,12 +333,12 @@ exports.commands = [{
     multiSelectAction: "forEach"
 }, {
     name: "modifyNumber+1",
-    bindKey: bindKey("Ctrl-Shift-Up", "Ctrl-Command-Up"),
+    bindKey: bindKey("Alt-Shift-Up", "Alt-Shift-Up"),
     exec: function(editor) { editor.modifyNumber(1); },
     multiSelectAction: "forEach"
 }, {
     name: "modifyNumber-1",
-    bindKey: bindKey("Ctrl-Shift-Down", "Ctrl-Command-Down"),
+    bindKey: bindKey("Alt-Shift-Down", "Alt-Shift-Down"),
     exec: function(editor) { editor.modifyNumber(-1); },
     multiSelectAction: "forEach"
 }, {