diff --git a/README_CN.md b/README_CN.md
index 0d704be..f4e616f 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -102,7 +102,7 @@ for example:
              'My font size is 28px and will not change with the system.',
                  style: TextStyle(
                    color: Colors.black,
-                   fontSize: ScreenUtil(allowFontScaling: true).setSp(28, false) 
+                   fontSize: ScreenUtil(allowFontScaling: true).setSp(28) 
                  )
              ),