diff --git a/Journal.Core/Services/JournalDatabaseService.cs b/Journal.Core/Services/JournalDatabaseService.cs
index 8ea7cec..d4c3105 100644
--- a/Journal.Core/Services/JournalDatabaseService.cs
+++ b/Journal.Core/Services/JournalDatabaseService.cs
@@ -10,7 +10,7 @@ public sealed class JournalDatabaseService(IJournalConfigService config) : IJour
     public const int KeySize = 32;
     public const int Iterations = 600_000;
     private static readonly byte[] DatabaseKeySalt = Encoding.UTF8.GetBytes("a_fixed_salt_for_the_db_key_deriv");
-    private static readonly object SqliteInitLock = new();
+    private static readonly Lock SqliteInitLock = new();
     private static bool _sqliteInitialized;
     private static readonly IReadOnlyList<string> RequiredSchemaTables =
         ["entries", "sections", "fragments", "tags", "fragment_tags"];
diff --git a/Journal.Core/Services/PythonSidecarAiService.cs b/Journal.Core/Services/PythonSidecarAiService.cs
index f101ab3..8bf4e1d 100644
--- a/Journal.Core/Services/PythonSidecarAiService.cs
+++ b/Journal.Core/Services/PythonSidecarAiService.cs
@@ -31,7 +31,7 @@ public sealed class PythonSidecarAiService : IAiService
             : "ok";
         var healthy = !payload.TryGetProperty("healthy", out var healthyNode) ||
                       healthyNode.ValueKind is JsonValueKind.True ||
-                      (healthyNode.ValueKind is JsonValueKind.False ? false : true);
+                      (healthyNode.ValueKind is not JsonValueKind.False);
         return new AiHealthDto(provider, Enabled: true, Healthy: healthy, Message: message);
     }
 
diff --git a/Journal.Core/Services/VaultStorageService.cs b/Journal.Core/Services/VaultStorageService.cs
index b9ff614..93fabb3 100644
--- a/Journal.Core/Services/VaultStorageService.cs
+++ b/Journal.Core/Services/VaultStorageService.cs
@@ -2,7 +2,6 @@ using System.IO.Compression;
 using System.Globalization;
 using System.Security.Cryptography;
 using System.Text;
-using System.Threading;
 
 namespace Journal.Core.Services;