diff --git a/source/ChanSort/MainForm.cs b/source/ChanSort/MainForm.cs
index 14e28ee..4afb577 100644
--- a/source/ChanSort/MainForm.cs
+++ b/source/ChanSort/MainForm.cs
@@ -32,6 +32,7 @@ namespace ChanSort.Ui
   public partial class MainForm : XtraForm
   {
     public static string AppVersion { get; private set; }
+    public static string AppVersionFull { get; private set; }
 
     private const int MaxMruEntries = 10;
     private readonly List<string> isoEncodings = new List<string>();
@@ -63,6 +64,7 @@ namespace ChanSort.Ui
 
       var version = this.GetType().Assembly.GetName().Version;
       AppVersion = new DateTime(2000, 1, 1).AddDays(version.Build).ToString("yyyy-MM-dd");
+      AppVersionFull = new DateTime(2000, 1, 1).AddDays(version.Build).AddSeconds(version.Revision * 2).ToString("yyyy-MM-dd_HHmm");
 
       // remember which columns should be visible by default
       foreach (GridColumn col in this.gviewLeft.Columns)
diff --git a/source/ChanSort/UpdateCheck.cs b/source/ChanSort/UpdateCheck.cs
index b28a558..381b190 100644
--- a/source/ChanSort/UpdateCheck.cs
+++ b/source/ChanSort/UpdateCheck.cs
@@ -22,7 +22,7 @@ namespace ChanSort.Ui
       try
       {
         var newVersion = this.GetLatestVersion();
-        if (newVersion.CompareTo(MainForm.AppVersion.TrimStart('v')) > 0)
+        if (newVersion.CompareTo(MainForm.AppVersionFull.TrimStart('v')) > 0)
           this.NotifyAboutNewVersion(newVersion);
       }
       catch { }
diff --git a/source/changelog.md b/source/changelog.md
index fd5c45e..e679a57 100644
--- a/source/changelog.md
+++ b/source/changelog.md
@@ -1,6 +1,9 @@
 ChanSort Change Log 
 ===================
 
+2020-12-29
+- update check could not distinguish between 2 program versions from the same day (kept showing "an update is available")
+
 2020-12-26_2
 - Panasonic: channel name editing is now supported when all channels implicitly use valid utf-8 encoding