diff --git a/src/HotChocolate/Language/src/Language.Utf8/Utf8Helper.cs b/src/HotChocolate/Language/src/Language.Utf8/Utf8Helper.cs
index b488a8c513c..ea88558e38b 100644
--- a/src/HotChocolate/Language/src/Language.Utf8/Utf8Helper.cs
+++ b/src/HotChocolate/Language/src/Language.Utf8/Utf8Helper.cs
@@ -26,7 +26,22 @@ public static void Unescape(
                 {
                     code = escapedString[++readPosition];
 
-                    if (code.IsValidEscapeCharacter())
+                    if (isBlockString && code == GraphQLConstants.Quote)
+                    {
+                        if (escapedString[readPosition + 1] == GraphQLConstants.Quote
+                            && escapedString[readPosition + 2] == GraphQLConstants.Quote)
+                        {
+                            readPosition += 2;
+                            unescapedString[writePosition++] = GraphQLConstants.Quote;
+                            unescapedString[writePosition++] = GraphQLConstants.Quote;
+                            unescapedString[writePosition++] = GraphQLConstants.Quote;
+                        }
+                        else
+                        {
+                            throw new Utf8EncodingException(Utf8Helper_InvalidQuoteEscapeCount);
+                        }
+                    }
+                    else if (code.IsValidEscapeCharacter())
                     {
                         if (code == GraphQLConstants.U)
                         {
@@ -137,4 +152,4 @@ private static int HexToDecimal(int a)
             _ => -1
         };
     }
-}
\ No newline at end of file
+}