diff --git a/lib/oto/commands/util/string_util.dart b/lib/oto/commands/util/string_util.dart
index f296332..2796f98 100644
--- a/lib/oto/commands/util/string_util.dart
+++ b/lib/oto/commands/util/string_util.dart
@@ -59,7 +59,7 @@ class StringReplacePattern extends Command {
 
     var start = text.indexOf(data.startPattern, data.startAt);
     var end = text.indexOf(data.endPattern, start);
-    text = text.replaceRange(start, end + value.length, value);
+    text = text.replaceRange(start, end + data.endPattern.length, value);
 
     await setProperty(data.setValue, text, showPrint: data.showPrint);