diff --git a/server/src/FilterLists.Data/Seed/Extensions/SeedExtension.cs b/server/src/FilterLists.Data/Seed/Extensions/SeedExtension.cs
index b8947ebe0..76649e190 100644
--- a/server/src/FilterLists.Data/Seed/Extensions/SeedExtension.cs
+++ b/server/src/FilterLists.Data/Seed/Extensions/SeedExtension.cs
@@ -1,6 +1,7 @@
 using System.Collections.Generic;
 using System.IO;
 using System.Text.Json;
+using Ardalis.GuardClauses;
 using Microsoft.EntityFrameworkCore.Metadata.Builders;
 
 namespace FilterLists.Data.Seed.Extensions
@@ -9,16 +10,17 @@ public static class SeedExtension
     {
         public static void HasDataJsonFile<TEntity>(this EntityTypeBuilder entityTypeBuilder)
         {
-            string path = Path.Combine("../../../data", $"{typeof(TEntity).Name}.json");
-            if (File.Exists(path))
+            Guard.Against.Null(entityTypeBuilder, nameof(entityTypeBuilder));
+
+            var path = Path.Combine("../../../data", $"{typeof(TEntity).Name}.json");
+            if (!File.Exists(path)) return;
+
+            var entitiesJson = File.ReadAllText(path);
+            var entities = JsonSerializer.Deserialize<IEnumerable<TEntity>>(entitiesJson, new JsonSerializerOptions
             {
-                var entitiesJson = File.ReadAllText(path);
-                var entities = JsonSerializer.Deserialize<IEnumerable<TEntity>>(entitiesJson, new JsonSerializerOptions
-                {
-                    PropertyNamingPolicy = JsonNamingPolicy.CamelCase
-                });
-                entityTypeBuilder.HasData((IEnumerable<object>)entities);
-            }
+                PropertyNamingPolicy = JsonNamingPolicy.CamelCase
+            });
+            entityTypeBuilder.HasData((IEnumerable<object>)entities);
         }
     }
 }
\ No newline at end of file