diff --git a/Libraries/Core/Controllers/CustomizationController.cs b/Libraries/Core/Controllers/CustomizationController.cs
index 0843525d..7ee551cd 100644
--- a/Libraries/Core/Controllers/CustomizationController.cs
+++ b/Libraries/Core/Controllers/CustomizationController.cs
@@ -1,4 +1,3 @@
-using System.Text.Json;
 using Core.Helpers;
 using Core.Models.Common;
 using Core.Models.Eft.Common;
@@ -14,8 +13,6 @@ using Core.Servers;
 using Core.Services;
 using Core.Utils.Cloners;
 using SptCommon.Annotations;
-using SptCommon.Extensions;
-using Location = Core.Models.Eft.Inventory.Location;
 
 namespace Core.Controllers;
 
@@ -31,8 +28,8 @@ public class CustomizationController(
     PaymentService _paymentService
 )
 {
-    protected string _lowerParentClothingId = "5cd944d01388ce000a659df9";
-    protected string _upperParentClothingId = "5cd944ca1388ce03a44dc2a4";
+    protected const string _lowerParentClothingId = "5cd944d01388ce000a659df9";
+    protected const string _upperParentClothingId = "5cd944ca1388ce03a44dc2a4";
 
     /// <summary>
     ///     Get purchasable clothing items from trader that match players side (usec/bear)
diff --git a/Libraries/Core/Servers/ConfigServer.cs b/Libraries/Core/Servers/ConfigServer.cs
index a0010449..309e7f45 100644
--- a/Libraries/Core/Servers/ConfigServer.cs
+++ b/Libraries/Core/Servers/ConfigServer.cs
@@ -14,7 +14,7 @@ public class ConfigServer
     protected JsonUtil _jsonUtil;
     protected FileUtil _fileUtil;
     protected Dictionary<string, object> configs = new();
-    protected readonly string[] acceptableFileExtensions = ["json", "jsonc"];
+    protected static readonly string[] acceptableFileExtensions = ["json", "jsonc"];
 
     public ConfigServer(
         ISptLogger<ConfigServer> logger,
diff --git a/Libraries/Core/Servers/SaveServer.cs b/Libraries/Core/Servers/SaveServer.cs
index c860f5ea..ee0ae845 100644
--- a/Libraries/Core/Servers/SaveServer.cs
+++ b/Libraries/Core/Servers/SaveServer.cs
@@ -22,7 +22,7 @@ public class SaveServer(
     ConfigServer _configServer
 )
 {
-    protected string profileFilepath = "user/profiles/";
+    protected const string profileFilepath = "user/profiles/";
 
     protected Dictionary<string, SptProfile> profiles = new();
     private Lock _lock = new();
diff --git a/Libraries/Core/Services/Cache/BundleHashCacheService.cs b/Libraries/Core/Services/Cache/BundleHashCacheService.cs
index dafe2aed..28c4bced 100644
--- a/Libraries/Core/Services/Cache/BundleHashCacheService.cs
+++ b/Libraries/Core/Services/Cache/BundleHashCacheService.cs
@@ -14,7 +14,7 @@ public class BundleHashCacheService(
 )
 {
     protected Dictionary<string, string> _bundleHashes = new();
-    protected readonly string _bundleHashCachePath = "./user/cache/bundleHashCache.json";
+    protected static readonly string _bundleHashCachePath = "./user/cache/bundleHashCache.json";
 
     public string GetStoredValue(string key)
     {
diff --git a/Libraries/Core/Services/I18nService.cs b/Libraries/Core/Services/I18nService.cs
index 9efd3158..8a4ad72f 100644
--- a/Libraries/Core/Services/I18nService.cs
+++ b/Libraries/Core/Services/I18nService.cs
@@ -8,8 +8,8 @@ public class I18nService
 {
     private List<string> _locales;
     private Dictionary<string, string> _fallbacks;
-    private string _defaultLocale;
-    private string _directory;
+    private readonly string _defaultLocale;
+    private readonly string _directory;
     private JsonUtil _jsonUtil;
     private FileUtil _fileUtil;
     private string _setLocale;
diff --git a/Libraries/Core/Utils/DatabaseImporter.cs b/Libraries/Core/Utils/DatabaseImporter.cs
index 4244079f..cc2df36f 100644
--- a/Libraries/Core/Utils/DatabaseImporter.cs
+++ b/Libraries/Core/Utils/DatabaseImporter.cs
@@ -18,6 +18,7 @@ public class DatabaseImporter : OnLoad
     private ValidationResult valid = ValidationResult.UNDEFINED;
     private string filepath;
     private HttpConfig httpConfig;
+    private const string _sptDataPath = "./Assets/";
 
     protected ISptLogger<DatabaseImporter> _logger;
     protected LocalisationService _localisationService;
@@ -62,7 +63,7 @@ public class DatabaseImporter : OnLoad
      */
     public string GetSptDataPath()
     {
-        return "./Assets/";
+        return _sptDataPath;
     }
 
     public async Task OnLoad()