diff --git a/Jellyfin.Server/Migrations/MigrationRunner.cs b/Jellyfin.Server/Migrations/MigrationRunner.cs
index 866262d22f..abfdcd77d5 100644
--- a/Jellyfin.Server/Migrations/MigrationRunner.cs
+++ b/Jellyfin.Server/Migrations/MigrationRunner.cs
@@ -22,8 +22,7 @@ namespace Jellyfin.Server.Migrations
         private static readonly Type[] _preStartupMigrationTypes =
         {
             typeof(PreStartupRoutines.CreateNetworkConfiguration),
-            typeof(PreStartupRoutines.MigrateMusicBrainzTimeout),
-            typeof(PreStartupRoutines.MigrateRatingLevels)
+            typeof(PreStartupRoutines.MigrateMusicBrainzTimeout)
         };
 
         /// <summary>
@@ -41,7 +40,8 @@ namespace Jellyfin.Server.Migrations
             typeof(Routines.MigrateDisplayPreferencesDb),
             typeof(Routines.RemoveDownloadImagesInAdvance),
             typeof(Routines.MigrateAuthenticationDb),
-            typeof(Routines.FixPlaylistOwner)
+            typeof(Routines.FixPlaylistOwner),
+            typeof(Routines.MigrateRatingLevels)
         };
 
         /// <summary>
diff --git a/Jellyfin.Server/Migrations/PreStartupRoutines/MigrateRatingLevels.cs b/Jellyfin.Server/Migrations/PreStartupRoutines/MigrateRatingLevels.cs
deleted file mode 100644
index 465bbd7fe1..0000000000
--- a/Jellyfin.Server/Migrations/PreStartupRoutines/MigrateRatingLevels.cs
+++ /dev/null
@@ -1,86 +0,0 @@
-using System;
-using System.Globalization;
-using System.IO;
-
-using Emby.Server.Implementations;
-using MediaBrowser.Controller;
-using Microsoft.Extensions.Logging;
-using SQLitePCL.pretty;
-
-namespace Jellyfin.Server.Migrations.PreStartupRoutines
-{
-    /// <summary>
-    /// Migrate rating levels to new rating level system.
-    /// </summary>
-    internal class MigrateRatingLevels : IMigrationRoutine
-    {
-        private const string DbFilename = "library.db";
-        private readonly ILogger<MigrateRatingLevels> _logger;
-        private readonly IServerApplicationPaths _applicationPaths;
-
-        public MigrateRatingLevels(ServerApplicationPaths applicationPaths, ILoggerFactory loggerFactory)
-        {
-            _applicationPaths = applicationPaths;
-            _logger = loggerFactory.CreateLogger<MigrateRatingLevels>();
-        }
-
-        /// <inheritdoc/>
-        public Guid Id => Guid.Parse("{67445D54-B895-4B24-9F4C-35CE0690EA07}");
-
-        /// <inheritdoc/>
-        public string Name => "MigrateRatingLevels";
-
-        /// <inheritdoc/>
-        public bool PerformOnNewInstall => false;
-
-        /// <inheritdoc/>
-        public void Perform()
-        {
-            var dataPath = _applicationPaths.DataPath;
-            var dbPath = Path.Combine(dataPath, DbFilename);
-            using (var connection = SQLite3.Open(
-                dbPath,
-                ConnectionFlags.ReadWrite,
-                null))
-            {
-                // Back up the database before deleting any entries
-                for (int i = 1; ; i++)
-                {
-                    var bakPath = string.Format(CultureInfo.InvariantCulture, "{0}.bak{1}", dbPath, i);
-                    if (!File.Exists(bakPath))
-                    {
-                        try
-                        {
-                            File.Copy(dbPath, bakPath);
-                            _logger.LogInformation("Library database backed up to {BackupPath}", bakPath);
-                            break;
-                        }
-                        catch (Exception ex)
-                        {
-                            _logger.LogError(ex, "Cannot make a backup of {Library} at path {BackupPath}", DbFilename, bakPath);
-                            throw;
-                        }
-                    }
-                }
-
-                // Migrate parental rating levels to new schema
-                _logger.LogInformation("Migrating parental rating levels.");
-                connection.Execute("UPDATE TypedBaseItems SET InheritedParentalRatingValue = NULL WHERE OfficialRating = 'NR'");
-                connection.Execute("UPDATE TypedBaseItems SET InheritedParentalRatingValue = NULL WHERE InheritedParentalRatingValue = ''");
-                connection.Execute("UPDATE TypedBaseItems SET InheritedParentalRatingValue = NULL WHERE InheritedParentalRatingValue = 0");
-                connection.Execute("UPDATE TypedBaseItems SET InheritedParentalRatingValue = 1000 WHERE InheritedParentalRatingValue = 100");
-                connection.Execute("UPDATE TypedBaseItems SET InheritedParentalRatingValue = 1000 WHERE InheritedParentalRatingValue = 15");
-                connection.Execute("UPDATE TypedBaseItems SET InheritedParentalRatingValue = 18 WHERE InheritedParentalRatingValue = 10");
-                connection.Execute("UPDATE TypedBaseItems SET InheritedParentalRatingValue = 18 WHERE InheritedParentalRatingValue = 9");
-                connection.Execute("UPDATE TypedBaseItems SET InheritedParentalRatingValue = 16 WHERE InheritedParentalRatingValue = 8");
-                connection.Execute("UPDATE TypedBaseItems SET InheritedParentalRatingValue = 12 WHERE InheritedParentalRatingValue = 7");
-                connection.Execute("UPDATE TypedBaseItems SET InheritedParentalRatingValue = 12 WHERE InheritedParentalRatingValue = 6");
-                connection.Execute("UPDATE TypedBaseItems SET InheritedParentalRatingValue = 12 WHERE InheritedParentalRatingValue = 5");
-                connection.Execute("UPDATE TypedBaseItems SET InheritedParentalRatingValue = 7 WHERE InheritedParentalRatingValue = 4");
-                connection.Execute("UPDATE TypedBaseItems SET InheritedParentalRatingValue = 6 WHERE InheritedParentalRatingValue = 3");
-                connection.Execute("UPDATE TypedBaseItems SET InheritedParentalRatingValue = 6 WHERE InheritedParentalRatingValue = 2");
-                connection.Execute("UPDATE TypedBaseItems SET InheritedParentalRatingValue = 0 WHERE InheritedParentalRatingValue = 1");
-            }
-        }
-    }
-}
diff --git a/Jellyfin.Server/Migrations/Routines/MigrateRatingLevels.cs b/Jellyfin.Server/Migrations/Routines/MigrateRatingLevels.cs
new file mode 100644
index 0000000000..9dee520a50
--- /dev/null
+++ b/Jellyfin.Server/Migrations/Routines/MigrateRatingLevels.cs
@@ -0,0 +1,103 @@
+using System;
+using System.Globalization;
+using System.IO;
+
+using Emby.Server.Implementations.Data;
+using MediaBrowser.Controller;
+using MediaBrowser.Controller.Persistence;
+using MediaBrowser.Model.Globalization;
+using Microsoft.Extensions.Logging;
+using SQLitePCL.pretty;
+
+namespace Jellyfin.Server.Migrations.Routines
+{
+    /// <summary>
+    /// Migrate rating levels to new rating level system.
+    /// </summary>
+    internal class MigrateRatingLevels : IMigrationRoutine
+    {
+        private const string DbFilename = "library.db";
+        private readonly ILogger<MigrateRatingLevels> _logger;
+        private readonly IServerApplicationPaths _applicationPaths;
+        private readonly ILocalizationManager _localizationManager;
+        private readonly IItemRepository _repository;
+
+        public MigrateRatingLevels(
+            IServerApplicationPaths applicationPaths,
+            ILoggerFactory loggerFactory,
+            ILocalizationManager localizationManager,
+            IItemRepository repository)
+        {
+            _applicationPaths = applicationPaths;
+            _localizationManager = localizationManager;
+            _repository = repository;
+            _logger = loggerFactory.CreateLogger<MigrateRatingLevels>();
+        }
+
+        /// <inheritdoc/>
+        public Guid Id => Guid.Parse("{67445D54-B895-4B24-9F4C-35CE0690EA07}");
+
+        /// <inheritdoc/>
+        public string Name => "MigrateRatingLevels";
+
+        /// <inheritdoc/>
+        public bool PerformOnNewInstall => false;
+
+        /// <inheritdoc/>
+        public void Perform()
+        {
+            var dbPath = Path.Combine(_applicationPaths.DataPath, DbFilename);
+
+            // Back up the database before modifying any entries
+            for (int i = 1; ; i++)
+            {
+                var bakPath = string.Format(CultureInfo.InvariantCulture, "{0}.bak{1}", dbPath, i);
+                if (!File.Exists(bakPath))
+                {
+                    try
+                    {
+                        File.Copy(dbPath, bakPath);
+                        _logger.LogInformation("Library database backed up to {BackupPath}", bakPath);
+                        break;
+                    }
+                    catch (Exception ex)
+                    {
+                        _logger.LogError(ex, "Cannot make a backup of {Library} at path {BackupPath}", DbFilename, bakPath);
+                        throw;
+                    }
+                }
+            }
+
+            // Migrate parental rating strings to new levels
+            _logger.LogInformation("Recalculating parental rating levels based on rating string.");
+            using (var connection = SQLite3.Open(
+                dbPath,
+                ConnectionFlags.ReadWrite,
+                null))
+            {
+                var queryResult = connection.Query("SELECT DISTINCT OfficialRating FROM TypedBaseItems");
+                foreach (var entry in queryResult)
+                {
+                    var ratingString = entry[0].ToString();
+                    if (string.IsNullOrEmpty(ratingString))
+                    {
+                        connection.Execute("UPDATE TypedBaseItems SET InheritedParentalRatingValue = NULL WHERE OfficialRating IS NULL OR OfficialRating='';");
+                    }
+                    else
+                    {
+                        var ratingValue = _localizationManager.GetRatingLevel(ratingString).ToString();
+                        if (string.IsNullOrEmpty(ratingValue))
+                        {
+                            ratingValue = "NULL";
+                        }
+
+                        var statement = connection.PrepareStatement("UPDATE TypedBaseItems SET InheritedParentalRatingValue = @Value WHERE OfficialRating = @Rating;");
+                        statement.TryBind("@Value", ratingValue);
+                        statement.TryBind("@Rating", ratingString);
+                        statement.ExecuteQuery();
+                    }
+                }
+            }
+        }
+    }
+}