diff --git a/src/YouTrackSharp/Management/UserManagementService.cs b/src/YouTrackSharp/Management/UserManagementService.cs
index 7ab26a79..4e386da8 100644
--- a/src/YouTrackSharp/Management/UserManagementService.cs
+++ b/src/YouTrackSharp/Management/UserManagementService.cs
@@ -115,7 +115,7 @@ public async Task UpdateUser(string username, string fullName = null, string ema
             var queryString = new Dictionary<string, string>(4);
             if (!string.IsNullOrEmpty(fullName))
             {
-                queryString.Add("fullName", Uri.EscapeDataString(fullName));
+                queryString.Add("fullName", fullName);
             }
             if (!string.IsNullOrEmpty(email))
             {