diff --git a/Kyoo.Common/Kyoo.Common.csproj b/Kyoo.Common/Kyoo.Common.csproj
index 9a1ba82b..c0e22521 100644
--- a/Kyoo.Common/Kyoo.Common.csproj
+++ b/Kyoo.Common/Kyoo.Common.csproj
@@ -12,7 +12,7 @@
 		<Company>SDG</Company>
 		<PackageLicenseExpression>GPL-3.0-or-later</PackageLicenseExpression>
 		<PackageRequireLicenseAcceptance>true</PackageRequireLicenseAcceptance>
-		<PackageVersion>1.0.23</PackageVersion>
+		<PackageVersion>1.0.24</PackageVersion>
 		<IncludeSymbols>true</IncludeSymbols>
 		<SymbolPackageFormat>snupkg</SymbolPackageFormat>
 		<LangVersion>default</LangVersion>
diff --git a/Kyoo.Common/Utility.cs b/Kyoo.Common/Utility.cs
index 0ee0c881..a25d9b4f 100644
--- a/Kyoo.Common/Utility.cs
+++ b/Kyoo.Common/Utility.cs
@@ -91,18 +91,18 @@ namespace Kyoo
 			}
 		}
 
-		public static IEnumerable<T> MergeLists<T>(IEnumerable<T> first,
+		public static T[] MergeLists<T>(IEnumerable<T> first,
 			IEnumerable<T> second, 
 			Func<T, T, bool> isEqual = null)
 		{
 			if (first == null)
-				return second;
+				return second.ToArray();
 			if (second == null)
-				return first;
+				return first.ToArray();
 			if (isEqual == null)
-				return first.Concat(second).ToList();
+				return first.Concat(second).ToArray();
 			List<T> list = first.ToList();
-			return list.Concat(second.Where(x => !list.Any(y => isEqual(x, y))));
+			return list.Concat(second.Where(x => !list.Any(y => isEqual(x, y)))).ToArray();
 		}
 
 		public static T Assign<T>(T first, T second)
@@ -183,7 +183,7 @@ namespace Kyoo
 				{
 					property.SetValue(first, RunGenericMethod<object>(
 						typeof(Utility), 
-						"MergeLists",
+						nameof(MergeLists),
 						GetEnumerableType(property.PropertyType), 
 						oldValue, newValue, null));
 				}
@@ -384,18 +384,21 @@ namespace Kyoo
 				.IfEmpty(() => throw new NullReferenceException($"A method named {name} with " +
 				                                                $"{args.Length} arguments and {generics.Length} generic " +
 				                                                $"types could not be found on {type.Name}."))
-				.Where(x =>
-				{
-					int i = 0;
-					return x.GetGenericArguments().All(y => y.IsAssignableFrom(generics[i++]));
-				})
-				.IfEmpty(() => throw new NullReferenceException($"No method {name} match the generics specified."))
-				.Where(x =>
-				{
-					int i = 0;
-					return x.GetParameters().All(y => y.ParameterType == args[i++].GetType());
-				})
-				.IfEmpty(() => throw new NullReferenceException($"No method {name} match the parameters's types."))
+				// TODO this won't work but I don't know why.
+				// .Where(x =>
+				// {
+				// 	int i = 0;
+				// 	return x.GetGenericArguments().All(y => y.IsAssignableFrom(generics[i++]));
+				// })
+				// .IfEmpty(() => throw new NullReferenceException($"No method {name} match the generics specified."))
+				
+				// TODO this won't work for Type<T> because T is specified in arguments but not in the parameters type.
+				// .Where(x =>
+				// {
+				// 	int i = 0;
+				// 	return x.GetParameters().All(y => y.ParameterType.IsInstanceOfType(args[i++]));
+				// })
+				// .IfEmpty(() => throw new NullReferenceException($"No method {name} match the parameters's types."))
 				.Take(2)
 				.ToArray();
 
diff --git a/Kyoo/Controllers/ThumbnailsManager.cs b/Kyoo/Controllers/ThumbnailsManager.cs
index bc91f1af..a9ca9d8b 100644
--- a/Kyoo/Controllers/ThumbnailsManager.cs
+++ b/Kyoo/Controllers/ThumbnailsManager.cs
@@ -10,14 +10,12 @@ namespace Kyoo.Controllers
 {
 	public class ThumbnailsManager : IThumbnailsManager
 	{
-		private readonly IConfiguration _config;
 		private readonly IFileManager _files;
 		private readonly string _peoplePath;
 		private readonly string _providerPath;
 
 		public ThumbnailsManager(IConfiguration configuration, IFileManager files)
 		{
-			_config = configuration;
 			_files = files;
 			_peoplePath = Path.GetFullPath(configuration.GetValue<string>("peoplePath"));
 			_providerPath = Path.GetFullPath(configuration.GetValue<string>("providerPath"));
@@ -67,10 +65,9 @@ namespace Kyoo.Controllers
 		{
 			if (people == null)
 				throw new ArgumentNullException(nameof(people));
-			string root = _config.GetValue<string>("peoplePath");
-			string localPath = Path.Combine(root, people.Slug + ".jpg");
-			
-			Directory.CreateDirectory(root);
+			if (people.Poster == null)
+				return;
+			string localPath = await GetPeoplePoster(people);
 			if (alwaysDownload || !File.Exists(localPath))
 				await DownloadImage(people.Poster, localPath, $"The profile picture of {people.Name}");
 		}
@@ -100,10 +97,7 @@ namespace Kyoo.Controllers
 			if (provider.Logo == null)
 				return;
 
-			string root = _config.GetValue<string>("providerPath");
-			string localPath = Path.Combine(root, provider.Slug + ".jpg");
-			
-			Directory.CreateDirectory(root);
+			string localPath = await GetProviderLogo(provider);
 			if (alwaysDownload || !File.Exists(localPath))
 				await DownloadImage(provider.Logo, localPath, $"The logo of {provider.Slug}");
 		}
@@ -157,9 +151,7 @@ namespace Kyoo.Controllers
 		{
 			if (provider == null)
 				throw new ArgumentNullException(nameof(provider));
-			string thumbPath = Path.GetFullPath(Path.Combine(_providerPath, $"{provider.Slug}.jpg"));
-			if (!thumbPath.StartsWith(_providerPath))
-				return Task.FromResult<string>(null);
+			string thumbPath = Path.GetFullPath(Path.Combine(_providerPath, $"{provider.Slug}.png"));
 			return Task.FromResult(thumbPath.StartsWith(_providerPath) ? thumbPath : null);
 		}
 	}