diff --git a/CHANGELOG.md b/CHANGELOG.md
index 786ce14..9997e28 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,11 @@
+## Lib.AspNetCore.ServerSentEvents 9.0.0
+- `IServerSentEventsClient.Disconnect` has been replaced by `IServerSentEventsClient.DisconnectAsync`, which will attempt to gracefully complete the underlying HTTP response when disconnecting a client
+- Dropped support for .NET Core 3.1 and .NET 5
+
+## Lib.AspNetCore.ServerSentEvents 8.3.1
+### Bug Fixes
+- Fix for scenario when reconnect interval happens to be shorter than connection timeout, which results in client being prevented from reconnecting.
+
 ## Lib.AspNetCore.ServerSentEvents 8.3.0
 ### Additions and Changes
 - Added support for scenario when multiple types are provided as `Accept` header value (thanks to @krebil)
diff --git a/Lib.AspNetCore.ServerSentEvents/Lib.AspNetCore.ServerSentEvents.csproj b/Lib.AspNetCore.ServerSentEvents/Lib.AspNetCore.ServerSentEvents.csproj
index e1caddb..5ee6117 100644
--- a/Lib.AspNetCore.ServerSentEvents/Lib.AspNetCore.ServerSentEvents.csproj
+++ b/Lib.AspNetCore.ServerSentEvents/Lib.AspNetCore.ServerSentEvents.csproj
@@ -2,7 +2,7 @@
   <PropertyGroup>
     <Description>Lib.AspNetCore.ServerSentEvents is a library which provides Server-Sent Events (SSE) support for ASP.NET Core</Description>
     <Copyright>Copyright © 2017 - 2023 Tomasz Pęczek</Copyright>
-    <VersionPrefix>8.3.0</VersionPrefix>
+    <VersionPrefix>9.0.0</VersionPrefix>
     <VersionSuffix></VersionSuffix>
     <Authors>Tomasz Pęczek</Authors>
     <TargetFrameworks>net6.0;net461</TargetFrameworks>