diff --git a/Boyfriend.csproj b/Boyfriend.csproj
index 8c4cd81..366d1c5 100644
--- a/Boyfriend.csproj
+++ b/Boyfriend.csproj
@@ -22,6 +22,7 @@
         <PackageReference Include="DiffPlex" Version="1.7.1"/>
         <PackageReference Include="Humanizer.Core.ru" Version="2.14.1"/>
         <PackageReference Include="JetBrains.Annotations" Version="2023.2.0"/>
+        <PackageReference Include="Microsoft.CodeAnalysis.BannedApiAnalyzers" Version="3.3.4"/>
         <PackageReference Include="Microsoft.Extensions.Hosting" Version="7.0.1"/>
         <PackageReference Include="Remora.Discord.Caching" Version="37.0.0"/>
         <PackageReference Include="Remora.Discord.Extensions" Version="5.3.2"/>
@@ -34,4 +35,7 @@
             <LastGenOutput>Messages.Designer.cs</LastGenOutput>
         </EmbeddedResource>
     </ItemGroup>
+    <ItemGroup>
+        <AdditionalFiles Include="CodeAnalysis\BannedSymbols.txt"/>
+    </ItemGroup>
 </Project>
diff --git a/CodeAnalysis/BannedSymbols.txt b/CodeAnalysis/BannedSymbols.txt
new file mode 100644
index 0000000..f664b89
--- /dev/null
+++ b/CodeAnalysis/BannedSymbols.txt
@@ -0,0 +1,19 @@
+M:System.Object.Equals(System.Object)~System.Boolean;Don't use object.Equals. Use IEquatable<T> or EqualityComparer<T>.Default instead.
+M:System.ValueType.Equals(System.Object)~System.Boolean;Don't use object.Equals(Fallbacks to ValueType). Use IEquatable<T> or EqualityComparer<T>.Default instead.
+M:System.Nullable`1.Equals(System.Object)~System.Boolean;Use == instead.
+T:System.IComparable;Don't use non-generic IComparable. Use generic version instead.
+M:System.Guid.#ctor;Probably meaning to use Guid.NewGuid() instead. If actually wanting empty, use Guid.Empty.
+M:System.Threading.Tasks.Task.Wait();Don't use Task.Wait.
+P:System.Threading.Tasks.Task`1.Result;Don't use Task.Result.
+M:System.Threading.ManualResetEventSlim.Wait();Specify a timeout to avoid waiting forever.
+M:System.Char.ToLower(System.Char);char.ToLower() changes behaviour depending on CultureInfo.CurrentCulture. Use char.ToLowerInvariant() instead. If wanting culture-sensitive behaviour, explicitly provide CultureInfo.CurrentCulture.
+M:System.Char.ToUpper(System.Char);char.ToUpper() changes behaviour depending on CultureInfo.CurrentCulture. Use char.ToUpperInvariant() instead. If wanting culture-sensitive behaviour, explicitly provide CultureInfo.CurrentCulture.
+M:System.String.ToLower();string.ToLower() changes behaviour depending on CultureInfo.CurrentCulture. Use string.ToLowerInvariant() instead. If wanting culture-sensitive behaviour, explicitly provide CultureInfo.CurrentCulture or use LocalisableString.
+M:System.String.ToUpper();string.ToUpper() changes behaviour depending on CultureInfo.CurrentCulture. Use string.ToUpperInvariant() instead. If wanting culture-sensitive behaviour, explicitly provide CultureInfo.CurrentCulture or use LocalisableString.
+M:Humanizer.InflectorExtensions.Pascalize(System.String);Humanizer's .Pascalize() extension method changes behaviour depending on CultureInfo.CurrentCulture. Use StringDehumanizeExtensions.ToPascalCase() instead.
+M:Humanizer.InflectorExtensions.Camelize(System.String);Humanizer's .Camelize() extension method changes behaviour depending on CultureInfo.CurrentCulture. Use StringDehumanizeExtensions.ToCamelCase() instead.
+M:Humanizer.InflectorExtensions.Underscore(System.String);Humanizer's .Underscore() extension method changes behaviour depending on CultureInfo.CurrentCulture. Use StringDehumanizeExtensions.ToSnakeCase() instead.
+M:Humanizer.InflectorExtensions.Kebaberize(System.String);Humanizer's .Kebaberize() extension method changes behaviour depending on CultureInfo.CurrentCulture. Use StringDehumanizeExtensions.ToKebabCase() instead.
+P:System.DateTime.Now;Use System.DateTime.UtcNow instead.
+P:System.DateTimeOffset.Now;Use System.DateTimeOffset.UtcNow instead.
+P:System.DateTimeOffset.DateTime;Use System.DateTimeOffset.UtcDateTime instead.
diff --git a/src/Data/Options/BoolOption.cs b/src/Data/Options/BoolOption.cs
index 55b846e..e8be77a 100644
--- a/src/Data/Options/BoolOption.cs
+++ b/src/Data/Options/BoolOption.cs
@@ -19,7 +19,7 @@ public class BoolOption : Option<bool> {
     }
 
     private static bool TryParseBool(string from, out bool value) {
-        from = from.ToLower();
+        from = from.ToLowerInvariant();
         value = false;
         switch (from) {
             case "true" or "1" or "y" or "yes" or "д" or "да":