diff --git a/PluralKit.Core/SchemaService.cs b/PluralKit.Core/SchemaService.cs
index fa3b1c78..ba2f8bf5 100644
--- a/PluralKit.Core/SchemaService.cs
+++ b/PluralKit.Core/SchemaService.cs
@@ -57,6 +57,11 @@ namespace PluralKit {
             _logger.Information("Current schema version is {CurrentVersion}, applying migration {MigrationId}", currentVersion, migrationId);
             await conn.ExecuteAsync(migrationQuery, transaction: tx);
             tx.Commit();
+            
+            // If the above migration creates new enum/composite types, we must tell Npgsql to reload the internal type caches
+            // This will propagate to every other connection as well, since it marks the global type mapper collection dirty.
+            // TODO: find a way to get around the cast to our internal tracker wrapper... this could break if that ever changes
+            ((PerformanceTrackingConnection) conn)._impl.ReloadTypes();
         }
     }
 }
\ No newline at end of file
diff --git a/PluralKit.Core/Utils.cs b/PluralKit.Core/Utils.cs
index 300f27bc..5b1126c8 100644
--- a/PluralKit.Core/Utils.cs
+++ b/PluralKit.Core/Utils.cs
@@ -451,7 +451,7 @@ namespace PluralKit
     public class PerformanceTrackingConnection: IDbConnection
     {
         // Simple delegation of everything.
-        private NpgsqlConnection _impl;
+        internal NpgsqlConnection _impl;
 
         private DbConnectionCountHolder _countHolder;
         private ILogger _logger;