diff --git a/frontend/src/App/AppUpdatedModalContent.js b/frontend/src/App/AppUpdatedModalContent.js
index c08dc6177..045d74007 100644
--- a/frontend/src/App/AppUpdatedModalContent.js
+++ b/frontend/src/App/AppUpdatedModalContent.js
@@ -10,9 +10,43 @@ import ModalFooter from 'Components/Modal/ModalFooter';
 import UpdateChanges from 'System/Updates/UpdateChanges';
 import styles from './AppUpdatedModalContent.css';
 
+function mergeUpdates(items, version, prevVersion) {
+  let installedIndex = items.findIndex((u) => u.version === version);
+  let installedPreviouslyIndex = items.findIndex((u) => u.version === prevVersion);
+
+  if (installedIndex === -1) {
+    installedIndex = 0;
+  }
+
+  if (installedPreviouslyIndex === -1) {
+    installedPreviouslyIndex = items.length;
+  } else if (installedPreviouslyIndex === installedIndex && items.size()) {
+    installedPreviouslyIndex += 1;
+  }
+
+  const appliedUpdates = items.slice(installedIndex, installedPreviouslyIndex);
+
+  if (!appliedUpdates.length) {
+    return null;
+  }
+
+  const appliedChanges = { new: [], fixed: [] };
+  appliedUpdates.forEach((u) => {
+    if (u.changes) {
+      appliedChanges.new.push(... u.changes.new);
+      appliedChanges.fixed.push(... u.changes.fixed);
+    }
+  });
+
+  const mergedUpdate = Object.assign({}, appliedUpdates[0], { changes: appliedChanges });
+
+  return mergedUpdate;
+}
+
 function AppUpdatedModalContent(props) {
   const {
     version,
+    prevVersion,
     isPopulated,
     error,
     items,
@@ -20,7 +54,7 @@ function AppUpdatedModalContent(props) {
     onModalClose
   } = props;
 
-  const update = items[0];
+  const update = mergeUpdates(items, version, prevVersion);
 
   return (
     <ModalContent onModalClose={onModalClose}>
@@ -30,7 +64,7 @@ function AppUpdatedModalContent(props) {
 
       <ModalBody>
         <div>
-          Version <span className={styles.version}>{version}</span> of Sonarr has been installed, in order to get the latest changes you'll need to reload Sonarr.
+          Sonarr has been updated to version <span className={styles.version}>{version}</span>, in order to get the latest changes you'll need to reload Sonarr.
         </div>
 
         {
@@ -88,6 +122,7 @@ function AppUpdatedModalContent(props) {
 
 AppUpdatedModalContent.propTypes = {
   version: PropTypes.string.isRequired,
+  prevVersion: PropTypes.string,
   isPopulated: PropTypes.bool.isRequired,
   error: PropTypes.object,
   items: PropTypes.arrayOf(PropTypes.object).isRequired,
diff --git a/frontend/src/App/AppUpdatedModalContentConnector.js b/frontend/src/App/AppUpdatedModalContentConnector.js
index b252868ce..4100ee674 100644
--- a/frontend/src/App/AppUpdatedModalContentConnector.js
+++ b/frontend/src/App/AppUpdatedModalContentConnector.js
@@ -8,8 +8,9 @@ import AppUpdatedModalContent from './AppUpdatedModalContent';
 function createMapStateToProps() {
   return createSelector(
     (state) => state.app.version,
+    (state) => state.app.prevVersion,
     (state) => state.system.updates,
-    (version, updates) => {
+    (version, prevVersion, updates) => {
       const {
         isPopulated,
         error,
@@ -18,6 +19,7 @@ function createMapStateToProps() {
 
       return {
         version,
+        prevVersion,
         isPopulated,
         error,
         items
diff --git a/frontend/src/Store/Actions/appActions.js b/frontend/src/Store/Actions/appActions.js
index 81c61ca80..d19bffe06 100644
--- a/frontend/src/Store/Actions/appActions.js
+++ b/frontend/src/Store/Actions/appActions.js
@@ -117,6 +117,9 @@ export const reducers = createHandleActions({
     };
 
     if (state.version !== version) {
+      if (!state.prevVersion) {
+        newState.prevVersion = state.version;
+      }
       newState.isUpdated = true;
     }
 
diff --git a/frontend/src/System/Updates/Updates.js b/frontend/src/System/Updates/Updates.js
index 87890df2f..4573b45f3 100644
--- a/frontend/src/System/Updates/Updates.js
+++ b/frontend/src/System/Updates/Updates.js
@@ -3,6 +3,7 @@ import PropTypes from 'prop-types';
 import React, { Component, Fragment } from 'react';
 import { icons, kinds } from 'Helpers/Props';
 import formatDate from 'Utilities/Date/formatDate';
+import formatDateTime from 'Utilities/Date/formatDateTime';
 import LoadingIndicator from 'Components/Loading/LoadingIndicator';
 import SpinnerButton from 'Components/Link/SpinnerButton';
 import InlineMarkdown from 'Components/Markdown/InlineMarkdown';
@@ -30,6 +31,8 @@ class Updates extends Component {
       updateMechanism,
       updateMechanismMessage,
       shortDateFormat,
+      longDateFormat,
+      timeFormat,
       onInstallLatestPress
     } = this.props;
 
@@ -134,7 +137,12 @@ class Updates extends Component {
                         <div className={styles.info}>
                           <div className={styles.version}>{update.version}</div>
                           <div className={styles.space}>&mdash;</div>
-                          <div className={styles.date}>{formatDate(update.releaseDate, shortDateFormat)}</div>
+                          <div
+                            className={styles.date}
+                            title={formatDateTime(update.releaseDate, longDateFormat, timeFormat)}
+                          >
+                            {formatDate(update.releaseDate, shortDateFormat)}
+                          </div>
 
                           {
                             update.branch === 'master' ?
@@ -151,11 +159,24 @@ class Updates extends Component {
                               <Label
                                 className={styles.label}
                                 kind={kinds.SUCCESS}
+                                title={formatDateTime(update.installedOn, longDateFormat, timeFormat)}
                               >
                                 Currently Installed
                               </Label> :
                               null
                           }
+
+                          {
+                            update.version !== currentVersion && update.installedOn ?
+                              <Label
+                                className={styles.label}
+                                kind={kinds.INVERSE}
+                                title={formatDateTime(update.installedOn, longDateFormat, timeFormat)}
+                              >
+                                Previously Installed
+                              </Label> :
+                              null
+                          }
                         </div>
 
                         {
@@ -215,6 +236,8 @@ Updates.propTypes = {
   updateMechanism: PropTypes.string,
   updateMechanismMessage: PropTypes.string,
   shortDateFormat: PropTypes.string.isRequired,
+  longDateFormat: PropTypes.string.isRequired,
+  timeFormat: PropTypes.string.isRequired,
   onInstallLatestPress: PropTypes.func.isRequired
 };
 
diff --git a/frontend/src/System/Updates/UpdatesConnector.js b/frontend/src/System/Updates/UpdatesConnector.js
index d93b3ba4a..dcb46d91a 100644
--- a/frontend/src/System/Updates/UpdatesConnector.js
+++ b/frontend/src/System/Updates/UpdatesConnector.js
@@ -45,7 +45,9 @@ function createMapStateToProps() {
         isInstallingUpdate,
         updateMechanism: generalSettings.item.updateMechanism,
         updateMechanismMessage: status.packageUpdateMechanismMessage,
-        shortDateFormat: uiSettings.shortDateFormat
+        shortDateFormat: uiSettings.shortDateFormat,
+        longDateFormat: uiSettings.longDateFormat,
+        timeFormat: uiSettings.timeFormat
       };
     }
   );
diff --git a/src/NzbDrone.Core.Test/UpdateTests/UpdatePackageProviderFixture.cs b/src/NzbDrone.Core.Test/UpdateTests/UpdatePackageProviderFixture.cs
index 1a2f757ca..bd70447d0 100644
--- a/src/NzbDrone.Core.Test/UpdateTests/UpdatePackageProviderFixture.cs
+++ b/src/NzbDrone.Core.Test/UpdateTests/UpdatePackageProviderFixture.cs
@@ -44,7 +44,7 @@ namespace NzbDrone.Core.Test.UpdateTests
         {
             const string branch = "master";
             UseRealHttp();
-            var recent = Subject.GetRecentUpdates(branch, new Version(2, 0));
+            var recent = Subject.GetRecentUpdates(branch, new Version(2, 0), null);
 
             recent.Should().NotBeEmpty();
             recent.Should().OnlyContain(c => c.Hash.IsNotNullOrWhiteSpace());
diff --git a/src/NzbDrone.Core/Datastore/Converters/SystemVersionConverter.cs b/src/NzbDrone.Core/Datastore/Converters/SystemVersionConverter.cs
new file mode 100644
index 000000000..68bfbe217
--- /dev/null
+++ b/src/NzbDrone.Core/Datastore/Converters/SystemVersionConverter.cs
@@ -0,0 +1,41 @@
+using System;
+using Marr.Data.Converters;
+using Marr.Data.Mapping;
+
+namespace NzbDrone.Core.Datastore.Converters
+{
+    public class SystemVersionConverter : IConverter
+    {
+        public object FromDB(ConverterContext context)
+        {
+            if (context.DbValue is string version)
+            {
+                return Version.Parse(version);
+            }
+
+            return null;
+        }
+
+        public object FromDB(ColumnMap map, object dbValue)
+        {
+            if (dbValue is string version)
+            {
+                return Version.Parse(version);
+            }
+
+            return null;
+        }
+
+        public object ToDB(object clrValue)
+        {
+            if (clrValue is Version version)
+            {
+                return version.ToString();
+            }
+            
+            return DBNull.Value;
+        }
+
+        public Type DbType => typeof(String);
+    }
+}
\ No newline at end of file
diff --git a/src/NzbDrone.Core/Datastore/Migration/141_add_update_history.cs b/src/NzbDrone.Core/Datastore/Migration/141_add_update_history.cs
new file mode 100644
index 000000000..dd6ae0237
--- /dev/null
+++ b/src/NzbDrone.Core/Datastore/Migration/141_add_update_history.cs
@@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+using System.Data;
+using FluentMigrator;
+using NzbDrone.Common.EnvironmentInfo;
+using NzbDrone.Common.Serializer;
+using NzbDrone.Core.Datastore.Converters;
+using NzbDrone.Core.Datastore.Migration.Framework;
+
+namespace NzbDrone.Core.Datastore.Migration
+{
+    [Migration(141)]
+    public class add_update_history : NzbDroneMigrationBase
+    {
+        protected override void LogDbUpgrade()
+        {
+            Create.TableForModel("UpdateHistory")
+                  .WithColumn("Date").AsDateTime().NotNullable().Indexed()
+                  .WithColumn("Version").AsString().NotNullable()
+                  .WithColumn("EventType").AsInt32().NotNullable();
+
+            Insert.IntoTable("UpdateHistory")
+                  .Row(new
+                  {
+                      Date = new UtcConverter().ToDB(DateTime.UtcNow).ToString(),
+                      Version = BuildInfo.Version.ToString(),
+                      EventType = 2
+                  });
+        }
+    }
+}
diff --git a/src/NzbDrone.Core/Datastore/TableMapping.cs b/src/NzbDrone.Core/Datastore/TableMapping.cs
index df9c97602..32c778d8f 100644
--- a/src/NzbDrone.Core/Datastore/TableMapping.cs
+++ b/src/NzbDrone.Core/Datastore/TableMapping.cs
@@ -39,6 +39,7 @@ using NzbDrone.Core.Messaging.Commands;
 using NzbDrone.Core.Languages;
 using NzbDrone.Core.Profiles.Languages;
 using NzbDrone.Core.Profiles.Releases;
+using NzbDrone.Core.Update.History;
 
 namespace NzbDrone.Core.Datastore
 {
@@ -139,6 +140,8 @@ namespace NzbDrone.Core.Datastore
 
             Mapper.Entity<DownloadHistory>().RegisterModel("DownloadHistory")
                   .AutoMapChildModels();
+
+            Mapper.Entity<UpdateHistory>().RegisterModel("UpdateHistory");
         }
 
         private static void RegisterMappers()
@@ -168,6 +171,7 @@ namespace NzbDrone.Core.Datastore
             MapRepository.Instance.RegisterTypeConverter(typeof(Command), new CommandConverter());
             MapRepository.Instance.RegisterTypeConverter(typeof(TimeSpan), new TimeSpanConverter());
             MapRepository.Instance.RegisterTypeConverter(typeof(TimeSpan?), new TimeSpanConverter());
+            MapRepository.Instance.RegisterTypeConverter(typeof(Version), new SystemVersionConverter());
         }
 
         private static void RegisterProviderSettingConverter()
diff --git a/src/NzbDrone.Core/Update/Events/UpdateInstalledEvent.cs b/src/NzbDrone.Core/Update/Events/UpdateInstalledEvent.cs
new file mode 100644
index 000000000..d16b8095c
--- /dev/null
+++ b/src/NzbDrone.Core/Update/Events/UpdateInstalledEvent.cs
@@ -0,0 +1,17 @@
+using System;
+using NzbDrone.Common.Messaging;
+
+namespace NzbDrone.Core.Update.History.Events
+{
+    public class UpdateInstalledEvent : IEvent
+    {
+        public Version PreviousVerison { get; set; }
+        public Version NewVersion { get; set; }
+
+        public UpdateInstalledEvent(Version previousVersion, Version newVersion)
+        {
+            PreviousVerison = previousVersion;
+            NewVersion = newVersion;
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/NzbDrone.Core/Update/History/UpdateHistory.cs b/src/NzbDrone.Core/Update/History/UpdateHistory.cs
new file mode 100644
index 000000000..62a3a6fc0
--- /dev/null
+++ b/src/NzbDrone.Core/Update/History/UpdateHistory.cs
@@ -0,0 +1,12 @@
+using System;
+using NzbDrone.Core.Datastore;
+
+namespace NzbDrone.Core.Update.History
+{
+    public class UpdateHistory : ModelBase
+    {
+        public DateTime Date { get; set; }
+        public Version Version { get; set; }
+        public UpdateHistoryEventType EventType { get; set; }
+    }
+}
diff --git a/src/NzbDrone.Core/Update/History/UpdateHistoryEventType.cs b/src/NzbDrone.Core/Update/History/UpdateHistoryEventType.cs
new file mode 100644
index 000000000..2ad99d624
--- /dev/null
+++ b/src/NzbDrone.Core/Update/History/UpdateHistoryEventType.cs
@@ -0,0 +1,9 @@
+namespace NzbDrone.Core.Update.History
+{
+    public enum UpdateHistoryEventType
+    {
+        Unknown = 0,
+        Initiated = 1,
+        Installed = 2
+    }
+}
diff --git a/src/NzbDrone.Core/Update/History/UpdateHistoryRepository.cs b/src/NzbDrone.Core/Update/History/UpdateHistoryRepository.cs
new file mode 100644
index 000000000..20ea5a239
--- /dev/null
+++ b/src/NzbDrone.Core/Update/History/UpdateHistoryRepository.cs
@@ -0,0 +1,56 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using NzbDrone.Core.Datastore;
+using NzbDrone.Core.Messaging.Events;
+
+namespace NzbDrone.Core.Update.History
+{
+    public interface IUpdateHistoryRepository : IBasicRepository<UpdateHistory>
+    {
+        UpdateHistory LastInstalled();
+        UpdateHistory PreviouslyInstalled();
+        List<UpdateHistory> InstalledSince(DateTime dateTime);
+    }
+
+    public class UpdateHistoryRepository : BasicRepository<UpdateHistory>, IUpdateHistoryRepository
+    {
+        public UpdateHistoryRepository(ILogDatabase logDatabase, IEventAggregator eventAggregator)
+            : base(logDatabase, eventAggregator)
+        {
+
+        }
+
+        public UpdateHistory LastInstalled()
+        {
+            var history = Query.Where(v => v.EventType == UpdateHistoryEventType.Installed)
+                               .OrderBy(v => v.Date)
+                               .Take(1)
+                               .FirstOrDefault();
+
+            return history;
+        }
+
+        public UpdateHistory PreviouslyInstalled()
+        {
+            var history = Query.Where(v => v.EventType == UpdateHistoryEventType.Installed)
+                               .OrderBy(v => v.Date)
+                               .Skip(1)
+                               .Take(1)
+                               .FirstOrDefault();
+
+            return history;
+        }
+
+        public List<UpdateHistory> InstalledSince(DateTime dateTime)
+        {
+            var history = Query.Where(v => v.EventType == UpdateHistoryEventType.Installed && v.Date >= dateTime)
+                               .OrderBy(v => v.Date)
+                               .ToList();
+
+            return history;
+        }
+    }
+}
diff --git a/src/NzbDrone.Core/Update/History/UpdateHistoryService.cs b/src/NzbDrone.Core/Update/History/UpdateHistoryService.cs
new file mode 100644
index 000000000..8d11ea054
--- /dev/null
+++ b/src/NzbDrone.Core/Update/History/UpdateHistoryService.cs
@@ -0,0 +1,71 @@
+using System;
+using System.Collections.Generic;
+using NzbDrone.Common.EnvironmentInfo;
+using NzbDrone.Core.Lifecycle;
+using NzbDrone.Core.Messaging.Events;
+using NzbDrone.Core.Update.History.Events;
+
+namespace NzbDrone.Core.Update.History
+{
+    public interface IUpdateHistoryService
+    {
+        Version PreviouslyInstalled();
+        List<UpdateHistory> InstalledSince(DateTime dateTime);
+    }
+
+    public class UpdateHistoryService : IUpdateHistoryService, IHandle<ApplicationStartedEvent>, IHandleAsync<ApplicationStartedEvent>
+    {
+        private readonly IUpdateHistoryRepository _repository;
+        private readonly IEventAggregator _eventAggregator;
+        private Version _prevVersion;
+
+        public UpdateHistoryService(IUpdateHistoryRepository repository, IEventAggregator eventAggregator)
+        {
+            _repository = repository;
+            _eventAggregator = eventAggregator;
+        }
+
+        public Version PreviouslyInstalled()
+        {
+            var history = _repository.PreviouslyInstalled();
+
+            return history?.Version;
+        }
+
+        public List<UpdateHistory> InstalledSince(DateTime dateTime)
+        {
+            return _repository.InstalledSince(dateTime);
+        }
+
+        public void Handle(ApplicationStartedEvent message)
+        {
+            if (BuildInfo.Version.Major == 10)
+            {
+                // Don't save dev versions, they change constantly
+                return;
+            }
+
+            var history = _repository.LastInstalled();
+
+            if (history == null || history.Version != BuildInfo.Version)
+            {
+                _prevVersion = history.Version;
+
+                _repository.Insert(new UpdateHistory
+                {
+                    Date = DateTime.UtcNow,
+                    Version = BuildInfo.Version,
+                    EventType = UpdateHistoryEventType.Installed
+                });
+            }
+        }
+
+        public void HandleAsync(ApplicationStartedEvent message)
+        {
+            if (_prevVersion != null)
+            {
+                _eventAggregator.PublishEvent(new UpdateInstalledEvent(_prevVersion, BuildInfo.Version));
+            }
+        }
+    }
+}
diff --git a/src/NzbDrone.Core/Update/RecentUpdateProvider.cs b/src/NzbDrone.Core/Update/RecentUpdateProvider.cs
index 6fcaf42c2..42b338f5f 100644
--- a/src/NzbDrone.Core/Update/RecentUpdateProvider.cs
+++ b/src/NzbDrone.Core/Update/RecentUpdateProvider.cs
@@ -1,6 +1,8 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using NzbDrone.Common.EnvironmentInfo;
 using NzbDrone.Core.Configuration;
+using NzbDrone.Core.Update.History;
 
 namespace NzbDrone.Core.Update
 {
@@ -13,18 +15,23 @@ namespace NzbDrone.Core.Update
     {
         private readonly IConfigFileProvider _configFileProvider;
         private readonly IUpdatePackageProvider _updatePackageProvider;
+        private readonly IUpdateHistoryService _updateHistoryService;
 
         public RecentUpdateProvider(IConfigFileProvider configFileProvider,
-                                   IUpdatePackageProvider updatePackageProvider)
+                                    IUpdatePackageProvider updatePackageProvider,
+                                    IUpdateHistoryService updateHistoryService)
         {
             _configFileProvider = configFileProvider;
             _updatePackageProvider = updatePackageProvider;
+            _updateHistoryService = updateHistoryService;
         }
 
         public List<UpdatePackage> GetRecentUpdatePackages()
         {
             var branch = _configFileProvider.Branch;
-            return _updatePackageProvider.GetRecentUpdates(branch, BuildInfo.Version);
+            var version = BuildInfo.Version;
+            var prevVersion = _updateHistoryService.PreviouslyInstalled();
+            return _updatePackageProvider.GetRecentUpdates(branch, version, prevVersion);
         }
     }
 }
diff --git a/src/NzbDrone.Core/Update/UpdatePackageProvider.cs b/src/NzbDrone.Core/Update/UpdatePackageProvider.cs
index d1cca39fc..829efb192 100644
--- a/src/NzbDrone.Core/Update/UpdatePackageProvider.cs
+++ b/src/NzbDrone.Core/Update/UpdatePackageProvider.cs
@@ -10,7 +10,7 @@ namespace NzbDrone.Core.Update
     public interface IUpdatePackageProvider
     {
         UpdatePackage GetLatestUpdate(string branch, Version currentVersion);
-        List<UpdatePackage> GetRecentUpdates(string branch, Version currentVersion);
+        List<UpdatePackage> GetRecentUpdates(string branch, Version currentVersion, Version previousVersion = null);
     }
 
     public class UpdatePackageProvider : IUpdatePackageProvider
@@ -49,8 +49,8 @@ namespace NzbDrone.Core.Update
 
             return update.UpdatePackage;
         }
-
-        public List<UpdatePackage> GetRecentUpdates(string branch, Version currentVersion)
+        
+        public List<UpdatePackage> GetRecentUpdates(string branch, Version currentVersion, Version previousVersion)
         {
             var request = _requestBuilder.Create()
                                          .Resource("/update/{branch}/changes")
@@ -59,6 +59,11 @@ namespace NzbDrone.Core.Update
                                          .AddQueryParam("runtimeVer", _platformInfo.Version)
                                          .SetSegment("branch", branch);
 
+            if (previousVersion != null && previousVersion != currentVersion)
+            {
+                request.AddQueryParam("prevVersion", previousVersion);
+            }
+
             if (_analyticsService.IsEnabled)
             {
                 // Send if the system is active so we know which versions to deprecate/ignore
diff --git a/src/Sonarr.Api.V3/Update/UpdateModule.cs b/src/Sonarr.Api.V3/Update/UpdateModule.cs
index 76c357be1..6c5ec785a 100644
--- a/src/Sonarr.Api.V3/Update/UpdateModule.cs
+++ b/src/Sonarr.Api.V3/Update/UpdateModule.cs
@@ -1,7 +1,9 @@
 using System.Collections.Generic;
 using System.Linq;
 using NzbDrone.Common.EnvironmentInfo;
+using NzbDrone.Common.Extensions;
 using NzbDrone.Core.Update;
+using NzbDrone.Core.Update.History;
 using Sonarr.Http;
 
 namespace Sonarr.Api.V3.Update
@@ -9,10 +11,12 @@ namespace Sonarr.Api.V3.Update
     public class UpdateModule : SonarrRestModule<UpdateResource>
     {
         private readonly IRecentUpdateProvider _recentUpdateProvider;
+        private readonly IUpdateHistoryService _updateHistoryService;
 
-        public UpdateModule(IRecentUpdateProvider recentUpdateProvider)
+        public UpdateModule(IRecentUpdateProvider recentUpdateProvider, IUpdateHistoryService updateHistoryService)
         {
             _recentUpdateProvider = recentUpdateProvider;
+            _updateHistoryService = updateHistoryService;
             GetResourceAll = GetRecentUpdates;
         }
 
@@ -38,6 +42,18 @@ namespace Sonarr.Api.V3.Update
                 {
                     installed.Installed = true;
                 }
+
+                var installDates = _updateHistoryService.InstalledSince(resources.Last().ReleaseDate)
+                                                        .DistinctBy(v => v.Version)
+                                                        .ToDictionary(v => v.Version);
+
+                foreach (var resource in resources)
+                {
+                    if (installDates.TryGetValue(resource.Version, out var installDate))
+                    {
+                        resource.InstalledOn = installDate.Date;
+                    }
+                }
             }
 
             return resources;
diff --git a/src/Sonarr.Api.V3/Update/UpdateResource.cs b/src/Sonarr.Api.V3/Update/UpdateResource.cs
index e01ad966d..d23d0dc1c 100644
--- a/src/Sonarr.Api.V3/Update/UpdateResource.cs
+++ b/src/Sonarr.Api.V3/Update/UpdateResource.cs
@@ -17,6 +17,7 @@ namespace Sonarr.Api.V3.Update
         public string FileName { get; set; }
         public string Url { get; set; }
         public bool Installed { get; set; }
+        public DateTime? InstalledOn { get; set; }
         public bool Installable { get; set; }
         public bool Latest { get; set; }
         public UpdateChanges Changes { get; set; }