diff --git a/dotnet/src/dotnetframework/GxClasses/Core/GXUtilsCommon.cs b/dotnet/src/dotnetframework/GxClasses/Core/GXUtilsCommon.cs
index 132e8360f..bdaa6264e 100644
--- a/dotnet/src/dotnetframework/GxClasses/Core/GXUtilsCommon.cs
+++ b/dotnet/src/dotnetframework/GxClasses/Core/GXUtilsCommon.cs
@@ -512,7 +512,7 @@ public class StringUtil
 		static char[] numbersAndSep = new char[] { '1', '2', '3', '4', '5', '6', '7', '8', '9', '-' };
 		static char[] numbers = new char[] { '1', '2', '3', '4', '5', '6', '7', '8', '9' };
 		internal static Dictionary<char, char> LogUserEntryWhiteList = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz123456789+-_=/[]{}\":, ".ToDictionary(item => item, item => item);
-		internal static Dictionary<char, char> HttpHeaderWhiteList = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz123456789./;-@(){}[]?,<>\\".ToDictionary(item => item, item => item);
+		internal static Dictionary<char, char> HttpHeaderWhiteList = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz123456789.;+-_=/[]{}\"':, @()?<>\\".ToDictionary(item => item, item => item);
 
 		internal static string Sanitize(string input, Dictionary<char, char> WhiteList)
 		{