diff --git a/CHANGELOG.md b/CHANGELOG.md
index 127ab4c..5b18cf4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+## 1.0.1
+
+**Bug fix:**
+
+* [socket.io-client-dart#214](https://github.com/rikulo/socket.io-client-dart/issues/214) 1.0.1 _placeholder binary data isn't received correctly
+
 ## 1.0.0
 
 **Features:**
diff --git a/README.md b/README.md
index ac7e1f2..114d76c 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,5 @@
 # socket_io_common
 Socket.io common parser library for Dart 2
+
+## Contributors
+- Thanks [@Curvel](https://github.com/Curvel) for https://github.com/rikulo/socket_io_common/pull/4
diff --git a/lib/src/engine/parser/parser.dart b/lib/src/engine/parser/parser.dart
index 6dd1530..e21b082 100644
--- a/lib/src/engine/parser/parser.dart
+++ b/lib/src/engine/parser/parser.dart
@@ -45,7 +45,7 @@ const Map<String, int> PacketTypeMap = const <String, int>{
 class PacketParser {
   static const ERROR = const {'type': 'error', 'data': 'parser error'};
   static String? encodePacket(Map packet,
-      {dynamic? supportsBinary,
+      {dynamic supportsBinary,
       utf8encode = false,
       required callback(_),
       bool fromClient = false}) {
diff --git a/pubspec.yaml b/pubspec.yaml
index 70a606a..c4f68d5 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: socket_io_common
 description: Socket.io common parser library.
-version: 1.0.0
+version: 1.0.1
 homepage: https://www.zkoss.org
 repository: https://github.com/rikulo/socket_io_common
 issue_tracker: https://github.com/rikulo/socket_io_common/issues