diff --git a/example/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata b/example/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata
index 1d526a1..919434a 100644
--- a/example/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata
+++ b/example/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata
@@ -2,6 +2,6 @@
 <Workspace
    version = "1.0">
    <FileRef
-      location = "group:Runner.xcodeproj">
+      location = "self:">
    </FileRef>
 </Workspace>
diff --git a/lib/format_markdown.dart b/lib/format_markdown.dart
index 95b22ed..394ba2b 100644
--- a/lib/format_markdown.dart
+++ b/lib/format_markdown.dart
@@ -6,7 +6,7 @@ class FormatMarkdown {
   static ResultMarkdown convertToMarkdown(MarkdownType type, String data, int fromIndex, int toIndex,
       {int titleSize = 1}) {
     late String changedData;
-    int? replaceCursorIndex;
+    late int replaceCursorIndex;
 
     switch (type) {
       case MarkdownType.bold:
@@ -52,7 +52,7 @@ class ResultMarkdown {
   int cursorIndex;
 
   /// index at which cursor need to be replaced if no text selected
-  int? replaceCursorIndex;
+  int replaceCursorIndex;
 
   /// Return [ResultMarkdown]
   ResultMarkdown(this.data, this.cursorIndex, this.replaceCursorIndex);
diff --git a/lib/markdown_text_input.dart b/lib/markdown_text_input.dart
index 459d277..c256e16 100644
--- a/lib/markdown_text_input.dart
+++ b/lib/markdown_text_input.dart
@@ -45,7 +45,7 @@ class _MarkdownTextInputState extends State<MarkdownTextInput> {
         .copyWith(text: result.data, selection: TextSelection.collapsed(offset: basePosition + result.cursorIndex));
 
     if (noTextSelected) {
-      _controller.selection = TextSelection.collapsed(offset: _controller.selection.end - result.replaceCursorIndex!);
+      _controller.selection = TextSelection.collapsed(offset: _controller.selection.end - result.replaceCursorIndex);
     }
   }