diff --git a/common/ASC.Common/Utils/Signature.cs b/common/ASC.Common/Utils/Signature.cs
index f2286255a65..2e3cc22ce40 100644
--- a/common/ASC.Common/Utils/Signature.cs
+++ b/common/ASC.Common/Utils/Signature.cs
@@ -65,7 +65,7 @@ public static T Read<T>(string signature, string secret, Action<string> signatur
         {
             signatureResolver?.Invoke(signature);
 
-            var payloadParts = Encoding.UTF8.GetString(WebEncoders.Base64UrlDecode(signature)).Split('?');
+            var payloadParts = Encoding.UTF8.GetString(WebEncoders.Base64UrlDecode(signature)).Split('?', 2);
 
             if (GetHashBase64(payloadParts[1].Trim() + secret) == payloadParts[0])
             {