diff --git a/src/MiniPdf/ExcelReader.cs b/src/MiniPdf/ExcelReader.cs
index c53d2bd5..8325f62b 100644
--- a/src/MiniPdf/ExcelReader.cs
+++ b/src/MiniPdf/ExcelReader.cs
@@ -3748,7 +3748,7 @@ private static (int FromCol, int FromColOffset, int FromRow, int FromRowOffset,
     {
         foreach (var declaration in style.Split(';'))
         {
-            var parts = declaration.Split(':', 2);
+            var parts = declaration.Split(new[] { ':' }, 2);
             if (parts.Length != 2 || !string.Equals(parts[0].Trim(), property, StringComparison.OrdinalIgnoreCase))
                 continue;
             var value = parts[1].Trim();