diff --git a/src/Dynamicweb.DataIntegration.Providers.ExcelProvider.csproj b/src/Dynamicweb.DataIntegration.Providers.ExcelProvider.csproj
index 6bc5f15..3afa63c 100644
--- a/src/Dynamicweb.DataIntegration.Providers.ExcelProvider.csproj
+++ b/src/Dynamicweb.DataIntegration.Providers.ExcelProvider.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
 	<PropertyGroup>
-		<Version>10.6.4</Version>
+		<Version>10.6.5</Version>
 		<AssemblyVersion>1.0.0</AssemblyVersion>
 		<Title>Excel Provider</Title>
 		<Description>Excel Provider</Description>
diff --git a/src/ExcelProvider.cs b/src/ExcelProvider.cs
index 8ed8fb9..2c7243c 100644
--- a/src/ExcelProvider.cs
+++ b/src/ExcelProvider.cs
@@ -490,27 +490,7 @@ public override string ValidateSourceSettings()
                     if (!File.Exists(filename))
                     {
                         return $"Excel file \"{SourceFile}\" does not exist. WorkingDirectory - {WorkingDirectory}";
-                    }
-
-                    try
-                    {
-                        using (var package = new ExcelPackage(new FileInfo(filename)))
-                        {
-                            foreach (var worksheet in package.Workbook.Worksheets)
-                            {
-                                string sheetName = worksheet.Name;
-
-                                if (sheetName.Contains(' '))
-                                {
-                                    return $"{sheetName} contains whitespaces";
-                                }
-                            }
-                        }
-                    }
-                    catch (Exception ex)
-                    {
-                        return $"Could not open source file: {filename} message: {ex.Message} stack: {ex.StackTrace}";
-                    }
+                    }                    
                 }
                 else
                 {