diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8f39fee5..fb3673fe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+[0.2.4] - 2020.08.25
+
+* Add missing key field `Sec-WebSocket-Protocol`.
+
 [0.2.3] - 2020.08.25
 
 * Add display_name for Call.
diff --git a/pubspec.yaml b/pubspec.yaml
index 1452b75e..90a9a84b 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: sip_ua
-version: 0.2.3
+version: 0.2.4
 description: A dart-lang version of the SIP UA stack.
 homepage: https://github.com/cloudwebrtc/dart-sip-ua
 environment: