diff --git a/Flutter/json_to_dart/CHANGELOG.md b/Flutter/json_to_dart/CHANGELOG.md
index e050d22..09482d9 100644
--- a/Flutter/json_to_dart/CHANGELOG.md
+++ b/Flutter/json_to_dart/CHANGELOG.md
@@ -1,3 +1,6 @@
+## 1.4.2
+
+* fix camelName error
 
 ## 1.4.1
 
diff --git a/Flutter/json_to_dart/lib/utils/camel_under_score_converter.dart b/Flutter/json_to_dart/lib/utils/camel_under_score_converter.dart
index 8985149..5950bec 100644
--- a/Flutter/json_to_dart/lib/utils/camel_under_score_converter.dart
+++ b/Flutter/json_to_dart/lib/utils/camel_under_score_converter.dart
@@ -44,18 +44,27 @@ String camelName(String name, {bool firstCharLowerCase = true}) {
   if (name.isNullOrEmpty) {
     return '';
   }
+
   for (final String symbol in symbolSet) {
     name = name.replaceAll(symbol, '_');
   }
 
   final List<String> camels = name.split('_');
-  for (final String camel in camels) {
-    if (result.length == 0 && firstCharLowerCase) {
-      result.write(camel.toLowerCase());
+  if (camels.length == 1) {
+    if (firstCharLowerCase) {
+      return name.substring(0, 1).toLowerCase() + name.substring(1);
     } else {
-      if (!name.isNullOrEmpty) {
-        result.write(camel.substring(0, 1).toUpperCase());
-        result.write(camel.substring(1).toLowerCase());
+      return name.substring(0, 1).toUpperCase() + name.substring(1);
+    }
+  } else {
+    for (final String camel in camels) {
+      if (result.length == 0 && firstCharLowerCase) {
+        result.write(camel.toLowerCase());
+      } else {
+        if (!name.isNullOrEmpty) {
+          result.write(camel.substring(0, 1).toUpperCase());
+          result.write(camel.substring(1).toLowerCase());
+        }
       }
     }
   }
diff --git a/Flutter/json_to_dart/pubspec.yaml b/Flutter/json_to_dart/pubspec.yaml
index 917d8ba..aa0ba5d 100644
--- a/Flutter/json_to_dart/pubspec.yaml
+++ b/Flutter/json_to_dart/pubspec.yaml
@@ -11,7 +11,7 @@ description: The tool to convert json to dart code.
 # In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
 # Read more about iOS versioning at
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
-version: 1.4.1
+version: 1.4.2
 
 environment:
   sdk: '>=2.17.0 <3.0.0'