diff --git a/lib/oto/commands/util/string_util.dart b/lib/oto/commands/util/string_util.dart
index ee66f53..f296332 100644
--- a/lib/oto/commands/util/string_util.dart
+++ b/lib/oto/commands/util/string_util.dart
@@ -54,11 +54,12 @@ class StringReplacePattern extends Command {
     var data = DataStringReplacePattern.fromJson(getParam(command));
     
     var text = data.text;
+    var value = data.value;
     var exitCode = 0;
 
     var start = text.indexOf(data.startPattern, data.startAt);
     var end = text.indexOf(data.endPattern, start);
-    text = text.replaceRange(start, end + 1, data.value);
+    text = text.replaceRange(start, end + value.length, value);
 
     await setProperty(data.setValue, text, showPrint: data.showPrint);