diff --git a/src/Translumo.Infrastructure/Constants/RegexStorage.cs b/src/Translumo.Infrastructure/Constants/RegexStorage.cs
index acc2eeb3..6bdcbe0b 100644
--- a/src/Translumo.Infrastructure/Constants/RegexStorage.cs
+++ b/src/Translumo.Infrastructure/Constants/RegexStorage.cs
@@ -1,4 +1,4 @@
-using System.Text.RegularExpressions;
+using System.Text.RegularExpressions;
 
 namespace Translumo.Infrastructure.Constants
 {
@@ -28,7 +28,7 @@ static RegexStorage()
             EndDotRegex = new Regex(@"\.{3,}$", RegexOptions.Compiled);
             GoogleTranslateResultRegex = new Regex("(?<=(<div(.*)class=\"result-container\"(.*)>))[\\s\\S]*?(?=(<\\/div>))", RegexOptions.Compiled | RegexOptions.IgnoreCase);
             GuidGenerationRegex = new Regex("[xy]", RegexOptions.Compiled);
-            YandexSidRegex = new Regex(@"(?<=(SID\:\s*')).*(?=('))", RegexOptions.Compiled);
+            YandexSidRegex = new Regex(@"(?<=(sid\:\s*')).*(?=('))", RegexOptions.Compiled | RegexOptions.IgnoreCase);
             DeeplSentenceRegex = new Regex(@"(\S.+?([.!?♪。]|$))([\r\n]+|(?=\s+|$))", RegexOptions.Compiled | RegexOptions.Multiline);
         }
     }
diff --git a/src/Translumo.Translation/Yandex/YandexReaderProxy.cs b/src/Translumo.Translation/Yandex/YandexReaderProxy.cs
index edb4063e..aff6661d 100644
--- a/src/Translumo.Translation/Yandex/YandexReaderProxy.cs
+++ b/src/Translumo.Translation/Yandex/YandexReaderProxy.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Linq;
 using System.Net.Http;
 using System.Text.Json;
@@ -61,16 +61,10 @@ public string ExtractSid(string body)
                 return string.Empty;
             }
 
-            const char SID_SEPARATOR = '.';
-
             var match = RegexStorage.YandexSidRegex.Match(body);
             if (match.Success)
             {
-                var splittedReversed = match.Value
-                    .Split(SID_SEPARATOR)
-                    .Select(str => new string(str.Reverse().ToArray()));
-
-                return string.Join(SID_SEPARATOR, splittedReversed);
+                return match.Value;
             }
 
             return string.Empty;