diff --git a/docs/Changelog.md b/docs/Changelog.md
index 2577b9c..2773200 100644
--- a/docs/Changelog.md
+++ b/docs/Changelog.md
@@ -1,5 +1,5 @@
 
-5.4.9.1 (2021-0?-??)
+5.4.9.1 (2021-06-23)
 ====================
 
 - Fix exception using named pipes.
@@ -12,7 +12,7 @@
 - Context menu font render quality fix.
 - Context menu and `cycle-audio` command supports external audio and subtitle tracks.
 - Fix window size not being saved.
-- libmpv shinchiro 2021-06-06
+- libmpv shinchiro 2021-06-20
 
 
 5.4.9.0 (2021-05-29)
diff --git a/src/Properties/AssemblyInfo.cs b/src/Properties/AssemblyInfo.cs
index a153dc7..039207d 100644
--- a/src/Properties/AssemblyInfo.cs
+++ b/src/Properties/AssemblyInfo.cs
@@ -6,7 +6,7 @@ using System.Runtime.InteropServices;
 // set of attributes. Change these attribute values to modify the information
 // associated with an assembly.
 [assembly: AssemblyTitle("mpv.net")]
-[assembly: AssemblyDescription("mpv based media player")]
+[assembly: AssemblyDescription("mpv based media player for Windows")]
 [assembly: AssemblyConfiguration("")]
 [assembly: AssemblyCompany("mpv.net/mpv/mplayer")]
 [assembly: AssemblyProduct("mpv.net")]
@@ -32,5 +32,5 @@ using System.Runtime.InteropServices;
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("5.4.9.0")]
-[assembly: AssemblyFileVersion("5.4.9.0")]
+[assembly: AssemblyVersion("5.4.9.1")]
+[assembly: AssemblyFileVersion("5.4.9.1")]