diff --git a/ArchiSteamFarm/ArchiWebHandler.cs b/ArchiSteamFarm/ArchiWebHandler.cs
index 9dcbd6097..d7c089bf6 100644
--- a/ArchiSteamFarm/ArchiWebHandler.cs
+++ b/ArchiSteamFarm/ArchiWebHandler.cs
@@ -565,7 +565,7 @@ namespace ArchiSteamFarm {
 		}
 
 		[PublicAPI]
-		public async Task<WebBrowser.ObjectResponse<T>?> UrlGetToJsonObjectWithSession<T>(string host, string request, IReadOnlyCollection<KeyValuePair<string, string>>? headers = null, string? referer = null, WebBrowser.ERequestOptions requestOptions = WebBrowser.ERequestOptions.None, bool checkSessionPreemptively = true, byte maxTries = WebBrowser.MaxTries) where T : class {
+		public async Task<WebBrowser.ObjectResponse<T>?> UrlGetToJsonObjectWithSession<T>(string host, string request, IReadOnlyCollection<KeyValuePair<string, string>>? headers = null, string? referer = null, WebBrowser.ERequestOptions requestOptions = WebBrowser.ERequestOptions.None, bool checkSessionPreemptively = true, byte maxTries = WebBrowser.MaxTries) {
 			if (string.IsNullOrEmpty(host)) {
 				throw new ArgumentNullException(nameof(host));
 			}
@@ -908,7 +908,7 @@ namespace ArchiSteamFarm {
 		}
 
 		[PublicAPI]
-		public async Task<WebBrowser.ObjectResponse<T>?> UrlPostToJsonObjectWithSession<T>(string host, string request, IReadOnlyCollection<KeyValuePair<string, string>>? headers = null, IDictionary<string, string>? data = null, string? referer = null, WebBrowser.ERequestOptions requestOptions = WebBrowser.ERequestOptions.None, ESession session = ESession.Lowercase, bool checkSessionPreemptively = true, byte maxTries = WebBrowser.MaxTries) where T : class {
+		public async Task<WebBrowser.ObjectResponse<T>?> UrlPostToJsonObjectWithSession<T>(string host, string request, IReadOnlyCollection<KeyValuePair<string, string>>? headers = null, IDictionary<string, string>? data = null, string? referer = null, WebBrowser.ERequestOptions requestOptions = WebBrowser.ERequestOptions.None, ESession session = ESession.Lowercase, bool checkSessionPreemptively = true, byte maxTries = WebBrowser.MaxTries) {
 			if (string.IsNullOrEmpty(host)) {
 				throw new ArgumentNullException(nameof(host));
 			}
@@ -1014,7 +1014,7 @@ namespace ArchiSteamFarm {
 		}
 
 		[PublicAPI]
-		public async Task<WebBrowser.ObjectResponse<T>?> UrlPostToJsonObjectWithSession<T>(string host, string request, IReadOnlyCollection<KeyValuePair<string, string>>? headers = null, ICollection<KeyValuePair<string, string>>? data = null, string? referer = null, WebBrowser.ERequestOptions requestOptions = WebBrowser.ERequestOptions.None, ESession session = ESession.Lowercase, bool checkSessionPreemptively = true, byte maxTries = WebBrowser.MaxTries) where T : class {
+		public async Task<WebBrowser.ObjectResponse<T>?> UrlPostToJsonObjectWithSession<T>(string host, string request, IReadOnlyCollection<KeyValuePair<string, string>>? headers = null, ICollection<KeyValuePair<string, string>>? data = null, string? referer = null, WebBrowser.ERequestOptions requestOptions = WebBrowser.ERequestOptions.None, ESession session = ESession.Lowercase, bool checkSessionPreemptively = true, byte maxTries = WebBrowser.MaxTries) {
 			if (string.IsNullOrEmpty(host)) {
 				throw new ArgumentNullException(nameof(host));
 			}
@@ -1229,7 +1229,7 @@ namespace ArchiSteamFarm {
 		}
 
 		[PublicAPI]
-		public static async Task<T?> WebLimitRequest<T>(string service, Func<Task<T?>> function) where T : class {
+		public static async Task<T> WebLimitRequest<T>(string service, Func<Task<T>> function) {
 			if (string.IsNullOrEmpty(service)) {
 				throw new ArgumentNullException(nameof(service));
 			}
diff --git a/ArchiSteamFarm/WebBrowser.cs b/ArchiSteamFarm/WebBrowser.cs
index a9f0d908c..01993b7bb 100644
--- a/ArchiSteamFarm/WebBrowser.cs
+++ b/ArchiSteamFarm/WebBrowser.cs
@@ -248,7 +248,7 @@ namespace ArchiSteamFarm {
 		}
 
 		[PublicAPI]
-		public async Task<ObjectResponse<T>?> UrlGetToJsonObject<T>(string request, IReadOnlyCollection<KeyValuePair<string, string>>? headers = null, string? referer = null, ERequestOptions requestOptions = ERequestOptions.None, byte maxTries = MaxTries) where T : class {
+		public async Task<ObjectResponse<T>?> UrlGetToJsonObject<T>(string request, IReadOnlyCollection<KeyValuePair<string, string>>? headers = null, string? referer = null, ERequestOptions requestOptions = ERequestOptions.None, byte maxTries = MaxTries) {
 			if (string.IsNullOrEmpty(request)) {
 				throw new ArgumentNullException(nameof(request));
 			}
@@ -287,7 +287,7 @@ namespace ArchiSteamFarm {
 
 					obj = serializer.Deserialize<T>(jsonReader);
 
-					if (obj == null) {
+					if (obj is null) {
 						ArchiLogger.LogGenericWarning(string.Format(CultureInfo.CurrentCulture, Strings.ErrorIsEmpty, nameof(obj)));
 
 						continue;
@@ -580,7 +580,7 @@ namespace ArchiSteamFarm {
 		}
 
 		[PublicAPI]
-		public async Task<ObjectResponse<TResult>?> UrlPostToJsonObject<TResult, TData>(string request, IReadOnlyCollection<KeyValuePair<string, string>>? headers = null, TData? data = null, string? referer = null, ERequestOptions requestOptions = ERequestOptions.None, byte maxTries = MaxTries) where TResult : class where TData : class {
+		public async Task<ObjectResponse<TResult>?> UrlPostToJsonObject<TResult, TData>(string request, IReadOnlyCollection<KeyValuePair<string, string>>? headers = null, TData? data = null, string? referer = null, ERequestOptions requestOptions = ERequestOptions.None, byte maxTries = MaxTries) where TData : class {
 			if (string.IsNullOrEmpty(request)) {
 				throw new ArgumentNullException(nameof(request));
 			}
@@ -618,7 +618,7 @@ namespace ArchiSteamFarm {
 
 					obj = serializer.Deserialize<TResult>(jsonReader);
 
-					if (obj == null) {
+					if (obj is null) {
 						ArchiLogger.LogGenericWarning(string.Format(CultureInfo.CurrentCulture, Strings.ErrorIsEmpty, nameof(obj)));
 
 						continue;